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

Eons ago, a rushing lava river formed this pristine passage through solid rock.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A natural history wunderkammer in the middle of the desert.

A geological mystery on Camelback Mountain.

These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

Petroglyphs, bird watching, and a 100-year-old Ranch in one location.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

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

Take a monster truck tour around an ostrich farm in the middle of the desert.

A bizarre house filled with an astounding array of collections.

An homage to everyone's favorite prehistoric cartoon family.

A reproduction of earth's many biomes.

Outsider Art Community.

An urban laboratory.

A self-built castle made by a mysterious man.

Mass graves and Victorian monuments mark the history of Memphis in this 19th century cemetery.

This sailor's boneyard was lost under a parking lot for decades before being rediscovered.

The final resting place of the most famous outlaw in the Old West.

Dozens of feral felines rule a segment of Hollywood's only graveyard.

The stone-covered graves lie within the ruins of an Old West ghost town.

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

This tucked-away cemetery is the final resting place of a prospector who uncovered one of the largest gold mines in Arizona.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.