The two cave guides had been into Craighead Caverns more times than they could count, but this was their own time, their own exploration, and the passage they squeezed through that day in 1939 was one they had never seen before. Jack Kiker and Clarence Hicks moved by lamplight through the dark of the Tennessee cave when they found the bones. They were large, clearly old, and clearly not human, so the two men carried them out and sent them to the American Museum of Natural History in New York. The identification came back: a very large jaguar.
Five years later, the famous paleontologist George Gaylord Simpson came down into the cave himself, recovered more bones, and made plaster casts of jaguar paw prints still pressed into the mud floor. He published the find in 1941. The animal had been an ice age jaguar, larger than the jaguars of today, prowling the dark under East Tennessee, leaving tracks that would outlast the ice age itself. But that cave, now known for the underground lake it holds, is only one of the strange places waiting under the limestone ridges of Appalachia.
Thirteen caves and tunnels hidden beneath these mountains hold stories that range from the merely odd to the nearly inexplicable, and the people who went in with lamps and notebooks have left a record that is stranger than any campfire tale. The count begins at Natural Tunnel in Scott County, Virginia, where a whole mountain ridge has a hole punched clean through it. The tunnel runs roughly 850 feet through Purchase Ridge and stands about ten stories tall. Stock Creek flows through the bottom, and since 1894, so do trains.
Railroad crews laid track through it in 1893, and the tunnel still carries freight today. William Jennings Bryan, later Secretary of State, reportedly called it the eighth wonder of the world. The part people keep getting wrong is the question of who dug it. Nobody did.
According to Virginia State Parks, the tunnel began forming more than a million years ago when groundwater, made slightly acidic by carbon dioxide, slowly dissolved the limestone and dolomite inside the ridge. Over time, Stock Creek was pulled underground and kept carving. What looks like engineering is really patience on a scale barely possible to imagine. A romantic tale is told here too, about a Cherokee maiden and a Shawnee warrior who leapt from the cliff above because they were forbidden to marry, the kind of lover’s leap story told at overlooks all across America, folklore rather than history.
The true story is the one written in the rock. Number two is Batcave on Blue Rock Mountain, along the Henderson and Rutherford County line in North Carolina. Most caves in Appalachia are carved from limestone, which water dissolves over ages to create rooms and passages. Granite does not work that way.
And yet, high on the side of Blue Rock Mountain, there is a cave in hard crystalline rock, often described as the largest known granite fissure cave in North America. Its main hallway runs about 300 feet long and rises roughly 85 feet high, with mapped passages stretching for something like a mile and a half. Instead of being dissolved out by water, this cave was made by the mountain itself coming apart. Enormous blocks of rock split along fractures and shifted, leaving dark gaps between them.
The mystery here is not about a lost people but about the rock itself: how do you get a cathedral-sized void inside a mountain that is not supposed to hollow out at all? Geologists can explain the general process, but it plays out over spans far longer than any human record. The cave is protected by the Nature Conservancy as a preserve, home to the endangered Indiana bat. Hikes there have been stopped to keep white-nose syndrome, a deadly bat disease, from spreading, so this is one wonder most people will only know from a distance, and that is exactly how the bats would want it.
Number three is Luray Caverns in Page County, Virginia. On August 13, 1878, five local men, among them a tinsmith named Andrew Campbell and a photographer named Benton Stebbins, noticed cool air breathing out of a sinkhole. They started digging, and about four hours later, they had a hole big enough for the smallest of them to squeeze through, slide down a rope, and explore by candlelight. What they found became one of the most famous show caves in America.
In 1880, a party from the Smithsonian Institution came to look and reported that there was probably no other cave in the world more completely and profusely decorated. But in a passage now called Skeleton’s Gorge, the discoverers reported something else: fragments of human bone sealed into the calcite. The accounts do not agree on the details. One version says the bones belong to a young Native American girl and were no more than about 500 years old.
Some modern retellings say 700. An old travel book quotes a guide describing an Indian boy who fell from an upper passage roughly a century and a half earlier. Those age guesses seem to rest on how fast the stone grew over the bones, and dripstone grows at wildly different speeds from one drip to the next. What is actually known is that someone, very likely a Native person, ended up deep in this cave long enough ago for the rock to begin closing over them.
Who they were and how they came to be there is a question the cave has never answered. The next two caves belong together, and between them sits an argument that has run for about 200 years. Number four is Organ Cave in Greenbrier County, West Virginia, a giant with more than 38 miles of mapped passage, named a national natural landmark in 1973. During the Civil War, Confederate workers mined it for saltpeter, the key ingredient in gunpowder.
The wooden hoppers they used to leach the nitrate from the cave dirt are still down there, and the cave holds them as the largest surviving collection of Civil War saltpeter hoppers in the nation. Reports from the cave also mention flint points left by early Native people and fossils of ice age animals. But the most famous story about Organ Cave is the one that may not be true. For much of the 20th century, people said this was the cave that gave Thomas Jefferson his mysterious giant bones.
The story was popularized by a local man, Andrew Price of Marlinton, in the early 1900s, and it got told and retold until it hardened into fact. In 2008, there was even a ceremony in West Virginia that repeated the Organ Cave claim. But the next cave on the list has a very good case that the honor is actually its own. Number five is Haynes Cave in Monroe County, West Virginia.
In the 1790s, a Greenbrier County man named John Stuart had workers digging saltpeter out of a cave when they hit bones, big ones. Stuart shipped them off to his friend Thomas Jefferson, who wrote back on May 26, 1796, delighted. On March 10, 1797, Jefferson presented his findings to the American Philosophical Society in Philadelphia. He believed the bones came from some enormous member of the cat family, a lionlike beast far larger than any lion, and he named it Megalonyx, the great claw.
Within a couple of years, the anatomist Caspar Wistar recognized that the bones looked much more like a sloth, a giant ground sloth, an ice age animal. A few decades later, it got a formal species name in Jefferson’s honor, Megalonyx jeffersonii. Today it is West Virginia’s official state fossil, so designated in 2008, and the original bones are still kept at the Academy of Natural Sciences in Philadelphia. But which cave did they come from?
In 1995, Smithsonian paleontologist Frederick Grady made the case for Haynes Cave just over the line in Monroe County. Two fragments of a Megalonyx shoulder blade had turned up there in 1993, and Grady pointed out that a name in Jefferson’s own paperwork, written as Frederick Crower, was most likely Frederick Gromer, the owner of Haynes Cave. The bones of a sloth, the spelling of a name, and a 200-year-old story starts to come apart. This exact pattern sits underneath most of the cave myths found online.
Huge bones come out of a cave and somebody says giants. Long tunnels run under a mountain and somebody says a lost civilization dug them. The evidence says otherwise. The giant bones of Appalachian caves again and again turn out to be ice age animals: sloths, bears, big cats.
Even Thomas Jefferson guessed wrong, and he was one of the sharpest minds of his day. As for the tunnels, cavers have been mapping these mountains for generations. Tennessee alone has more than 10,000 recorded caves, and what they map is natural rock dissolved by water, not engineered corridors. The human traces found down there, the torch charcoal, the footprints, the mining pits, all point to the ancestors of today’s Native nations.
The old lost race idea that hangs over all of this was taken apart by the evidence well over a century ago. The real story does not need giants. Number six is Cathedral Caverns near Grant in Marshall County, Alabama. The first thing that hits a visitor is the mouth: the entrance is 128 feet wide and 25 feet high, built as the largest commercial cave opening in the world.
It used to be known simply as Bat’s Cave. In 1955, a man named Jay Gurley opened it to visitors, and according to the story, his wife looked up at the soaring ceiling and said it looked like a cathedral. The name stuck. Inside stands a stalagmite called Goliath, about 45 feet tall and some 243 feet around, billed as one of the largest anywhere, and there is a flowstone formation that looks like a frozen waterfall 135 feet long.
The rock itself is limestone laid down in ancient seas between roughly 350 and 320 million years ago. But the deepest history sits right at the entrance. Archaeologists from the University of Alabama’s State Museum of Natural History and from Jacksonville State University excavated at the cave’s mouth, and their work indicates Native people were using this place around 8,000 years ago. Long before Gurley, long before the name, people were standing in this same enormous doorway.
The state of Alabama bought the cave in 1987, and it opened as a state park in May 2000. The cathedral was already old when the first congregation arrived. Number seven is Dust Cave in Lauderdale County, Alabama, in the northwest corner of the state in the limestone bluffs above Coffee Slough, a tributary of the Tennessee River. It sits on the Highland Rim rather than the high mountains, but it lies within the federally defined Appalachian region.
What came out of it is extraordinary. Dr. Richard Cobb found the cave in 1984. Excavations began in 1989 under Dr.
Boyce Driskell of the University of Alabama, and fieldwork continued off and on until 2002. For thousands of years, this cave was sealed off. Between about 17,000 and 15,000 years ago, river sediment filled and buried it. Then the water table dropped, the sediment flushed out, and around 10,600 years ago the cave became livable.
People moved in almost right away, and they came back season after season from about 10,500 to about 5,200 years ago. Archaeologists dug through layers they labeled with letters from A at the top all the way down to Y. It is one of the earliest stratified late Paleoindian and Archaic sites in the Southeast. Every layer is a chapter: spear points from the end of the ice age, hearths, and in one phase, the burials of both people and their dogs laid to rest together, a detail that speaks louder than any artifact about what those animals meant.
Seven thousand years of family history stacked like pages in a book that was buried before anyone could read it. Number eight is Craighead Caverns, home of the Lost Sea, in Monroe County, Tennessee, between Sweetwater and Madisonville in the foothills of the Smokies. This cave holds a lake about 800 feet long and 220 feet wide, four and a half acres of water underground, listed by Guinness as the largest underground lake in the United States. It was found in 1905 by a 13-year-old boy named Ben Sands, who squeezed through a small opening and came out over dark water he could not see the end of.
But the real chills came in 1939 with Kiker and Hicks and the jaguar bones, and in May 1941 with Simpson’s published find. The animal was an ice age jaguar, bigger than the jaguars of today, prowling the dark under East Tennessee. This is also old Cherokee country; the Overhill towns were not far from here. The cave’s own history says that in a room nearly a mile in, now called the council room, people have found pottery, arrowheads, and other artifacts, though no published archaeological study confirming the details has been found.
The jaguar, though, is on the record. A big cat walked through here, and its tracks have outlasted the ice age itself. Number nine is Big Bone Cave in Van Buren County, Tennessee, up on the edge of the Cumberland Plateau. The cave earned its name in 1811 when workers found the bones of another giant ground sloth, the same species as Jefferson’s Megalonyx jeffersonii.
That skeleton now sits at the Academy of Natural Sciences in Philadelphia, and according to the state of Tennessee, it is the only known specimen of a giant ground sloth with a complete pelvis. Then in 1971, Big Bone Cave gave up the bones of a Pleistocene jaguar too, an ice age giant and an ice age hunter both preserved in the cool, dark of the plateau. The human story here is just as layered. During the War of 1812 and again in the Civil War, as many as 300 miners dug nitrate from this cave.
Because the air is so dry, their gear survived: wooden water pipes, rail tracks, catwalks, ore carts, hoppers, vats, ladders. The state calls them the best preserved saltpeter mining artifacts in Tennessee. The cave has nearly 10 miles of mapped passages, is a national natural landmark, and access is tightly limited, with tours arranged through Rock Island State Park. What still nags at people is simple: how does a nine-foot beast end up deep inside a mountain?
Did it wander in, fall through a sinkhole, or get washed in? For any single animal, nobody can say for certain. The cave keeps its own counsel. Number ten is Meadowcroft Rockshelter near Avella in Washington County, Pennsylvania.
Strictly speaking, this is not a cave. It is a great sandstone overhang above Cross Creek in the Appalachian Plateau of southwestern Pennsylvania. But what is buried beneath it might be one of the most important archaeological sites on the continent. In 1955, the landowner, Albert Miller, spotted artifacts in a groundhog burrow, and then he did something wise: he kept quiet to protect the site from looters until he could find the right person.
That person was archaeologist James Adovasio, who led excavations there with the University of Pittsburgh from 1973 to 1979. They took more than 50 radiocarbon dates, mostly from charcoal in old hearths, and the dates kept coming back older than anyone expected: around 16,000 years ago for the earliest human use and possibly as far back as 19,000. That would mean people were here thousands of years before the famous Clovis culture, which for decades was thought to be the first in the Americas. The honest part is that not everyone accepts it.
Critics argued that coal deposits underneath could have contaminated the samples and made them read too old. Adovasio answered those critics point by point. A 2013 survey of archaeologists found about 38 to 40 percent supporting the early dates and around 20 percent rejecting them, with the rest somewhere in between. Meadowcroft was named a national historic landmark on April 5, 2005.
Whatever the final verdict, the people who sat by those fires were the first Pennsylvanians, and they deserve the argument. Number eleven is a cave archaeologists call Third Unnamed Cave, at the foot of the Cumberland Plateau escarpment in north-central Tennessee. That name is deliberate. Researchers in Tennessee number these caves instead of naming them so looters cannot find them.
This one guards a remarkable secret. More than a kilometer from the entrance, over half a mile into total darkness, there is a chamber with images carved into the ceiling. And right beneath that ceiling, on the floor, ancient people were mining. They dug into the cave sediments for nodules of high-quality chert, the stone you make blades and spear points from.
Radiocarbon dates put the mining in the Terminal Archaic, roughly 3,000 years ago. Archaeologists Jan Simek, J. Franklin, and Sarah Sherwood found the whole workshop left in place: mining pits still bearing the marks of digging sticks, black smudges where torches were knocked against the walls to keep them burning, small fireplaces, footprints, and hundreds of piles of flintknapping debris sitting right where the knappers left them when they set down their stones and walked back out toward the light. Older footprints in the same cave have been dated to roughly 5,000 years ago.
So here is the puzzle: why carve art directly over a mine? Was the art a blessing, a warning, a record? Was the stone itself considered sacred because of where it came from? The researchers documented the link.
What it meant to the people who made it can only be carefully guessed. Number twelve is Jaguar Cave, also in north-central Tennessee, and it is where those 274 footprints pressed into the mud come in. Jaguar Cave has about 13 kilometers of mapped passage. More than 4,500 years ago, during the late Archaic, a small group of people went in carrying torches of rivercane.
They waded the stream, climbed a steep breakdown pile, squeezed through a crawl, and walked through a big trunk passage. Then they turned into a side passage about 500 meters long, roughly a two-hour journey from the entrance. In 1976, modern cavers rediscovered that passage. They call it Aborigine Avenue, and on its soft, damp floor were 274 relatively complete footprints.
Archaeologist Patty Jo Watson and her colleagues spent about a decade documenting them. The prints came from at least two trips and nine individuals, men and women, adults and possibly an adolescent. Most of them walked barefoot. One may have worn woven sandals of plant fiber.
The charcoal from their torches dates back more than 5,000 calendar years. You can read their choices in the mud. One person walked to the edge of a pit, looked down, and turned back. One stepped off the trail to look at a fallen flowstone column, then rejoined the group.
At the end of the walkable passage, there is another 130 meters you would have to belly crawl. They did not. They milled around, then headed home. And they took nothing.
No mining, no burials, no art. The researchers concluded this was most likely exploration for its own sake, curiosity, the same itch that sends cavers underground today. Sadly, even on the rediscovery trip, some prints were stepped on before anyone recognized them. The cave was gated in 2000 to protect what is left.
Forty-five centuries of mud, and it only takes one careless boot. Number thirteen is the art caves of the Cumberland Plateau in Tennessee, locations kept confidential. Across the plateau and the Tennessee River Valley, archaeologists have found prehistoric art deep in the dark zone of caves, past the last reach of daylight. Across the Southeast, more than 100 caves with prehistoric art are now known.
Some of these images are Mississippian, from roughly a thousand years ago or less: antlered serpents, birds, human figures with wings. But some are far older. In 2013, a team led by Jan Simek of the University of Tennessee, with Alan Cressler of the US Geological Survey, Nicholas Herrmann, and Sarah Sherwood, published more than a decade of fieldwork in the journal Antiquity. Among their findings was a charcoal drawing apparently showing a human figure in a hunting scene dated to about 6,000 years ago, some of the oldest known cave art in North America, here under these hills.
But the date is not the part that gives chills. It is the map. When the team plotted every site across the landscape, a pattern appeared. The open-air art painted on high bluffs and cliff faces sat up top, and it was mostly done in red.
The cave art sat down below, inside the earth, and it was mostly done in black. Two different sets of images, two different colors, two different levels of the world. The researchers proposed that ancient people had organized the whole landscape according to their understanding of the cosmos: an upper world up in the open sky, a lower world under the ground. Many southeastern Native traditions describe a universe in layers much like that.
In Cherokee tradition, there is an upper world, this world, and a world beneath, and caves and deep springs were among the passages between them. So those people crawling deep into darkness by the light of cane torches were not wandering lost. They were going somewhere, into the underworld itself, to leave their marks where they believed those marks belonged. That is why the art was drawn where no audience would ever see it.
It was not made for an audience. It may have been made for the world below. Today, the Eastern Band of Cherokee Indians works alongside researchers to help interpret these places, which means that 6,000 years later, the descendants of those artists are still part of the conversation. So the walk back up toward the light passes all of it again: Natural Tunnel, a hole through a mountain carved by nothing but water and time; Batcave split open in solid granite; Luray with the bones sealed in its stone; Organ Cave and Haynes Cave and the sloth that fooled Thomas Jefferson; Cathedral Caverns and its 8,000-year-old doorway; Dust Cave buried by a river and then lived in for 7,000 years; the Lost Sea and its ice age jaguar tracks; Big Bone Cave and its sloth; Meadowcroft and the fight over the oldest fires; the chert miners of Third Unnamed Cave; the nine explorers of Jaguar Cave; and finally the art caves of the plateau, where the darkness itself was the point.
One question stays open: did the people who made the dark zone art truly see the caves as a lower world, or is that reading too much into a pattern of red and black? The debate is real, and the descendants of those artists are still here to share in it. And whether the caves were doors to another world or simply places worth exploring for their own sake, one thing holds.
The mountains have been keeping these secrets a long time, and they will share them with the patient.
