A huge musical instrument played by the ocean.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

Concrete strongholds stand guard over the Golden Gate.

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.

The final resting place of the Emperor of the United States and Protector of Mexico.

The miraculous hydrant that saved the Mission District in 1906.

Furniture tries to escape an abandoned building in San Francisco.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

A Barbary Coast watering hole built into a Gold Rush shipwreck.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Only hotel where you can legally launder money.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

A mysterious painting of the self-declared Emperor of the United States watches over a local hof-brau.

The restored and active Victorian-era final resting place of San Francisco.

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

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

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

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

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

Coastal dunes, site of buried Egyptian movie set and former utopian colony.

An alley covered with 20 years of bubble gum.