Legend says train robbers stashed their gold within the depths of this unusual cave.

The cinder cone volcano with a less than complimentary name.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

The eroded core of an ancient volcano is now accessible by a short hike.

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

This collection of Wild West movie memorabilia also claims to hold some secrets of the Lost Dutchman's mine.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

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

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

A natural history wunderkammer in the middle of the desert.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

A Tucson museum and performance space full of found-object movable sculptures.

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

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

A mysterious spirit totem at the edge of Navajo lands.

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

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

An artificial crater field that trained astronauts for lunar exploration.

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

In Tucson a giant metal snake helps pedestrians cross a busy highway.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

This golf ball–shaped former desert real estate office now houses a UFO museum.

Don't blink or you'll miss it.