The magic's in the hole!

A museum dedicated to the history and exploration of both popular music and science fiction.

A wall of chewing gum moonlights as collective art.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A man-made island in scenic San Francisco Bay.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

A museum dedicated to the alleged Roswell Incident.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

The only museum of sake in the United States is nestled in an unlikely California college town.

Over 300 taxidermied animals in a Californian restaurant make for a taxidermist's dream and an animal lover's nightmare.

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

Austin’s nonprofit-run graffiti park where street art is meant to be painted over.

Free public park and gardens filled with peacocks and peahens.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Secret North Korean passage discovered below the world's most dangerous border.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

This Japanese national treasure was originally built in 593.

Peace Park and the Atomic Bomb Dome.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.