This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

A natural history museum with an extensive collection of bird dioramas.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

These eerie outliers of the lightning bug family glow a mysterious blue color.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

The remains of the iconic train crash from the movie The Fugitive can still be found rusting along the Great Smoky Railroad.

Enormous lake at the bottom of a unique cave system.

More than five miles of underground passageways.

This vast kitty-themed collection illustrates the history of human-cat interaction.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

Crumbling ruins mark the site of a couple's grisly murder in the woods.

Incredible miniature towns and buildings created and decorated with thousands of tiny rocks.

Granite outcropping that the state's tourism bureau doesn't promote because of its delicate ecosystem.

4,000 monkeys used for medical testing on an island off of South Carolina.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

This natural spring not only claims to heal the wounded but it has also been willed to God.

The oldest bridge in South Carolina may have been designed by the same man who created the Washington Monument.

Despite being burnt down multiple times, the ruins of this South Carolina church are still standing.

The record holder for the world’s largest peach.