An essential stop before plundering, BYO Cutlass.

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

Tiki luxury on Nob Hill.

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

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

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

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

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

San Francisco's newly reopened hands-on science museum.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Olfactory delights in San Francisco's Botanical Gardens.

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

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Its buzzing collection honors vibrator history.

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

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

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

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 huge musical instrument played by the ocean.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

A "haunted" landmark on the coast of Southern California.