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

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

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

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

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

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

Concrete crosses scattered across the Arizona scrubland which were used to align spy satellites.

A towering bronze statue memorializes the founding father of postwar American conservatism.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

A self-built castle made by a mysterious man.

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