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

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

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

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

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

For those going through a life transition, a place to leave behind a piece of your former self.

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

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

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

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.

An urban laboratory.

An artificial crater field that trained astronauts for lunar exploration.

Don't blink or you'll miss it.

Collection of vintage trailers double as hotel rooms.

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

What is the Thing?

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

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

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

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

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

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