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

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

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

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

This sanguine boulevard was named after a deadly cowboy bar fight.

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

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.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

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

The fading, forgotten remains of a once bright and booming factory.

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

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

An Arizona museum with a collection of pharmaceutical oddities, including a jar of a gangster's chewed gum.

An artificial crater field that trained astronauts for lunar exploration.

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

Don't blink or you'll miss it.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

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

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

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

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

Collection of vintage trailers double as hotel rooms.