This memorial pyramid marker honors one of the United States Government's first official camel riders.

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

A Saint Nicholas-themed ghost town in the Mojave desert.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

Don't blink or you'll miss it.

This abandoned horse racing track was an exercise in hubris from its inception.

A self-built castle made by a mysterious man.

Opinions differ as to whether this Arizona tree was actually used as a Wild West jail, but that hasn't stopped the town from capitalizing on it.

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

A museum and tribute to a brave profession.

The unusual burial monument of Arizona's first governor.

Once a year, at exactly 11:11 a.m., this monument comes to life.

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

A motel dedicated to Southwestern nostalgia.

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

A Wild West jailhouse that slid down the mountainside.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

An homage to everyone's favorite prehistoric cartoon family.

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

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

A spiritual vortex among the red rocks in Sedona.

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

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.

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