A popular tourist cave with a dark past.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

Colorful Native American paintings are hidden within this small cavern.

A stealthy Apache hideaway that became the haunting site of a mass grave.

This central Nevada cave is the spiritual home of ancient and enigmatic pictographs.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

A hotly contested micro-nation off the coast of Montserrat.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

The narrow mountain road that carves a path between Florence and Victor is tied to ghost towns and ghost stories.

“You better take care of me Lord, if you don't you're gonna have me on your hands.” ― Hunter S. Thompson, Fear and Loathing in Las Vegas.

This enigmatic building features numerous architectural styles.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

A beautiful combination of living flora with preserved bones covers the shelves of this shop.

This former open-pit manganese mine is now a massive graffiti canvas.

This vintage animatronics show is the Vegas version of a walk through the woods.

A small store filled with animal skulls and other curiosities.

A multiversal transit station located right below a highway interchange.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.