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

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

An vast warehouse of everyday treasures in Berkeley, CA.

The Flatiron Building's storied West Coast cousin is a lot more into religion.

With statues of Nelson Mandela and Harvey Milk this monument has been called the Mount Rushmore of California.

Concrete strongholds stand guard over the Golden Gate.

A 90-acre park on former landfill that hosts an annual kite festival.

A playground built by the kids that is a child's wonderland, and a helicopter parent's nightmare.

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

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

A living time capsule of the 1960s Richardson Bay water-front.

Internationally-recognized arts center housed in a century-old former military barracks.

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 man-made island in scenic San Francisco Bay.

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

Once the largest windmill outside of Holland, with enormous 114 foot sails.

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

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

The key to turning shifting dunes into the green oasis of Golden Gate Park.

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

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

Shoot for par over the bodies of the dead on this cemetery-cum-golf course.

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

Guns that have been defending San Francisco since 1904.