An unfinished rail tunnel that has since been used to house cheese and bats.

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

Enormous lake at the bottom of a unique cave system.

A Nessie-like monster supposedly lurks in this lake.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

According to local lore, this narrow passageway through two large rocks was accidentally created by the devil himself.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

This North Carolina grave is the final resting place of the world's most famous conjoined twins.

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

This Transylvania County city is home to a rare white squirrel population that is descended from an escaped carnival animal.

This tiny man looms large over downtown Charleston.

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

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

An abandoned 1920s school with a mysterious history.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

The secret city built by the Manhattan Project.

Mile-long cave system near Great Smoky Mountains.

Thousands of jack o'lanterns light up Halloween at this historic West Virginia home.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This bridge is haunted by the ghost of a distraught mother.

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