Frank Lloyd Wright died a year before construction on his largest public project even began.

Abandoned Air Force base that has fallen into disrepair.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

A decommissioned Naval base now rents itself out for people who want to blow stuff up.

Once the largest winery in the world, this castle-like building now sits abandoned on the San Pablo/San Francisco Bay shore.

A strange house built only at night, with rumored mystic inspiration.

One of the ghostly stops along Route 66.

The rusting remains of the largest assembled WWII fleet on the West Coast.

An abandoned convention space that has been left to the homeless and the radical.

This mountaintop beacon is only lit three times a year but shines like some kind of all-seeing eye.

Another of California's unused Cold War missile defense complexes has become a graffiti gallery.

Elephant seals and sea lions have turned the abandoned buildings on this island into their endangered love shack.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

This little gem of Spanish Colonial architecture has been abandoned since the 1950s.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

An abandoned Cold War missile radar site.

An abandoned car and strange wooden debris are among the scattered remains of the old sand and gravel quarry.

A pier that used to act as a busy ferry dock is now a decaying favorite of local fisherman and urban artists.