A Wild West jailhouse that slid down the mountainside.

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

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 once popular resort—said to be the vacation spot of gangster Al Capone—now remains abandoned in the woods of Arizona.

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

At an isolated roadside rest area stands a monument marking where famous Western star Tom Mix died in 1940.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

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

These free-roaming horses were once destined to disappear from the land.

See massive fossils that are over 200 million years old in northeastern Arizona.

Once disputed as the largest sundial in the world.

A reproduction of earth's many biomes.

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

The ghostly remains of an accidental sea.

Version of the French Riviera destroyed by the sea.

A remote desert lookout offers unparalleled views of the California badlands for those who brave the trek.

A monument to a one-legged kidnapper, horse thief, and charlatan asks visitors to throw rocks in a pile.

Along a California highway is a kind of Jurassic Park made of metal.

A UFO scrapyard in the California desert.

A hand-built folk art installation covered with messages of God's love.

An off-grid art installation that encourages its visitors to imagine a world without waste.

The remnants of an early automobile route across shifting sand dunes can still be found in the deserts of Southern California.

Semi-recognized center of the world, with many oddities.

Every Christmas, one Arizona city makes the most of its dry climate by creating an arid desert tannenbaum.