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

Tiki luxury on Nob Hill.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

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

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The headquarters of a secretive order is also a beautifully-designed park.

An extensive collection of ancient Egyptian artifacts and mummies.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

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

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

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

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

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

An artsy hidden staircase leads to breathtaking views of San Francisco.

A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

A 300-ship graveyard, with a few still visible at low tide.

An unassuming grey box sitting on San Francisco's Pier 17 is a "sky diary" of the coastal city's temperamental weather.

This eatery transports diners to a place that no longer exists: East Germany.

Floating man-made island and upscale restaurant.

A rococo retro-futurist future-rustic vernacular between yesterday’s tomorrow and the future that never was.

An invitation-only museum of items natural and bizarre, arcane and exotic.