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

This is one really big nut.

An urban laboratory.

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

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

Ancient pueblos built into the base of a natural canyon wall.

A Wild West jailhouse that slid down the mountainside.

Don't blink or you'll miss it.

Make a wish at what might be America's only Catholic shrine to a sinner.

A rare wayfinding portmanteau of “Street” and “Avenue.”

This collection of neon icons is preserving Arizona's history, one sign at a time.

The world's largest military aircraft cemetery.

This curiosity shop contains a museum filled with bizarre, unique objects.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

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

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

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

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

Collection of vintage trailers double as hotel rooms.

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

Stairs often replace streets on the steep slopes of this old mining town.

Nevada's largest cactus collection stands outside a candy mogul's small factory.