Beneath a Virginia City bar is the entrance to an abandoned gold mine.

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

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

The headquarters of a secretive order is also a beautifully-designed park.

San Francisco Bay's ghost town.

An extensive collection of ancient Egyptian artifacts and mummies.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.