Three hundred years of preserved Spanish colonial history in San Antonio.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

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

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A winding path built in secret on the edge of the continent.

A huge musical instrument played by the ocean.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.