The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

Wild West history in Hollywood style.

Pay your respects to a folk-punk legend.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

100 massive sculptures in the Hudson River Valley.

The world-record holder for the longest bridge stretching continuously over water.

A snapshot of the city's fascinating voodoo culture.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

The magic's in the hole!

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

Elvis's own personal tropical hideaway.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

This weird abode has inspired everything from the "House on Haunted Hill" to a robot hunter's pad.

The ruins of the movie ranch owned by actor and stuntman Ray "Crash" Corrigan.

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”