Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

Mysterious library of an infamous financier and spiritual seeker.

Enormous lake at the bottom of a unique cave system.

The first KFC is on the National Register of Historic Places.

The first full-scale tunnel built in America is short but scenic.

Home of an evil witch famous within southern folklore.

This structure among the trees was the result of divine inspiration.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

A former 19th-century tavern, famous for its peach brandy and honey concoction.

An abandoned theme park with a strange and tumultuous past.

These early tent-shaped grave coverings are unique to Appalachia.

Visit this playground of waterfalls, caves and sinkholes.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

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

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

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

The mysterious 855-foot zigzagging stone wall has been baffling people for centuries.

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

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

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

A historic dam made famous for its turbines and feature in a Hollywood classic.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

Abandoned for 60 years, this submerged bridge was completely forgotten until the lake was drained.