An off-the-beaten path cave with an underground lake.

The first permanent memorial to a unique secret weapon of World War II.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

Take a monster truck tour around an ostrich farm in the middle of the desert.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

A once popular resort—said to be the vacation spot of gangster Al Capone—now remains abandoned in the woods of Arizona.

A geological mystery on Camelback Mountain.

A partial tunnel blasted into a steep ridge is all that remains of a failed railway across Arizona.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

Along the old Route 66 is an abandoned trading post made from old telephone poles, built by a former circus clown.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

This giant steer-skull edifice refuses to die.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

A mysterious "wedding cake" castle in the middle of the urban desert.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

These free-roaming horses were once destined to disappear from the land.

A natural history wunderkammer in the middle of the desert.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.