Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

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

The former Naval shipyard is open for exploring - mostly.

Law-protected wreckage serves as a peculiar memorial for an almost forgotten World War II tragedy.

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

A B&B on a Victorian lighthouse station in San Francisco Bay.

Abortion, prohibition, religion, war, and fear all play a part in the history of this idiosyncratic Pacifica castle.

A storybook European village in Berkeley.

Where a staggering 747 ships were constructed during World War II.

Dive bar built out of the remains of a whaling ship.

Social saloon from a scrapped trans-Pacific 19th century steamer.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

Concrete strongholds stand guard over the Golden Gate.

A vast city of the dead, where the deceased outnumber the living by more than a million.

Radioactivity still cause for concern at this urban explorer's paradise.

Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

A rococo retro-futurist future-rustic vernacular between yesterday’s tomorrow and the future that never was.

This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

A 131-year-old wunderkammer of Texas history.

Twenty churches beautifully painted by 19th-century Czech and German immigrants in Texas.

This underwater old Texas hill town only resurfaces during harsh drought.