Mile-long cave system near Great Smoky Mountains.

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

The scant remains of this flooded historic village can be explored in one of the most remote areas of the Great Smokies.

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

A rapidly disappearing authentic bit of the old south.

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

This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

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

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

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

Railroad came. People came. Railroad left. Town died.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.