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

An artificial crater field that trained astronauts for lunar exploration.

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

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

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

A Wild West jailhouse that slid down the mountainside.

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

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

Water of undetermined depth has attracted rare fish and cult leaders alike.

An homage to everyone's favorite prehistoric cartoon family.

An incredible airplane graveyard sits outside this small museum dedicated to preserving aviation history.

A giant open-air sculpture made of over 200 full-sized boats.

The most unique castle in all of Southern California, entirely constructed from repurposed materials.

San Diego's most historic and haunted home.

The overgrown ruins of a once thriving World War I-era copper mine.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

A former utopian healing center created by a huckster and built by derelicts.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

An abandoned 1920s-era stretch of cabins now overshadowed by the 66 Motel.

This mysterious petroglyph evokes the ancient swastika symbol but was later vandalized with the more troublesome Nazi one.

One of the ghostly stops along Route 66.

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

The ghost town that ended up on Ebay.

On a barren hillside in the Yucca Valley, the recently restored Desert Christ Park has attracted pilgrims and kitsch hunters for over 50 years.