A hidden subterranean installation offers a view of the sky.

The only theatre in the world constructed specifically for sound movement.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

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.

A huge musical instrument played by the ocean.

A large instrument played by the wind.

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

A modern mechanical planetary system, part of a 10,000 year clock.

A free, public museum dedicated to the fascinating science of sight.

Once the gateway to the utopian dream-village of a Civil War embalmer.

Abandoned landscape once home to "the world's largest winery."

Once the largest winery in the world, this castle-like building now sits abandoned on the San Pablo/San Francisco Bay shore.

Spiral labyrinth hidden in the hills above Oakland, CA.

One of the best absinthe distilleries in the United States.

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

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

A temple devoted to inner esoteric mysteries located in a California commercial strip.

Bonsai garden in Oakland is curated by the first non-Japanese female bonsai master in the United States.

A crumbling Beaux Arts monument to the Bay Area's age of rail.

Oakland's beautiful monumental cemetery.

A massive ultra-modern church presents a science-fiction view of Catholicism's inclusive future.

Travelers exchange letters with woodland creatures at this mini post office.

A store that sells all manner of bones, insects, and animal curiosities.