A self-built castle made by a mysterious man.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.

A monument to the forgotten French explorers and their landmark expedition.

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

An entire city block built completely out of petrified wood.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

Just a man taking his prehistoric pet for a stroll.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

A cemetery housing wild west legends in South Dakota.

Quite possibly the last cross all humans will ever see.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

A natural gas leak provides a flickering flame beneath a waterfall.