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

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

This partially buried wreck is one of the most complete of its kind but is only revealed when the sea allows.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

Art in the form of a winding, man made crack in stone.

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

This San Diego museum, housed in a former Navy training facility, is dedicated to preserving women’s historic achievements.

A museum befitting the city responsible for supplying the majority of the world's LSD.

This mysterious series of teeny guerrilla installations sheds a whimsical light on street art in Oakland.

Antiques by the Bay.

Playable, historic pinball machines fill this Alameda museum.

Subterranean house made out of a grain silo, located in the Santa Cruz Mountains.

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

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

Hidden among the multi-million dollar mansions in the Santa Cruz hills is a sanctuary for troubled birds.

Don't be a grizzly man. Get personal with Alaska's wild bears from the safety of this conservationist camp.

Low tide reveals 8,000-year-old rock carvings in Southern Alaska.

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

Bring your hiking shoes, wool socks, and thermal underwear for a stay in these cozy forest huts.

Early habitat dioramas and home of the elusive gaff, the skvader.