The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

The rocks of a certain area of Butte, Montana give off a musical ring when hit.

Home to the deepest rift anywhere on Earth.

A few dilapidated structures are all that remain of this deserted former silver mining town.

A rapidly disappearing glacier filled with extinct grasshoppers, perfectly preserved in the ice.

A miraculous natural phenomenon known as "the spring that breathes."

One man's ambition created this psychedelic log home.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

An experimental, automotive replica of Stonehenge.

The highest bridge in America was built for an almost unnervingly small amount of money.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

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.

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

The clock that sets them all.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

A little-known hot spring haven right below the highway.

This naturally-sourced hot spring is now home to a clothing-optional resort.

Community owned and operated, this property is home to a diverse set of nudists.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.