This 19th century train workshop is a treasure trove of railroad history.

The California capital city once stood 10 feet lower than it does today.

A replica of the first public theater built in California.

I Street Bridge is the heaviest swinging center bridge in the United States.

Art Deco stylings conceal the true nature of this bridge.

The former Naval shipyard is open for exploring - mostly.

This abandoned boat was left in place thanks to its rotting beauty.

Concrete strongholds stand guard over the Golden Gate.

Ride on a fully-restored Nike nuclear-tipped missile elevator from the Cold War.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

One of the last remaining Carpenter Gothic churches is situated on a wildflower conservatory overlooking the bay.

This historic California cemetery holds the bodies of veterans of both the Civil War and the Donner Party.

The haunting ruins of Jack London's dream house.

A winding path built in secret on the edge of the continent.

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

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

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

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