A public fountain that spouts "health water" from a nearby spring.

A forensic lab dedicated to fighting crimes against wildlife.

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

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

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

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

Olfactory delights in San Francisco's Botanical Gardens.

This turn of the century masterpiece has a mysterious goaty interloper.

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

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

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

This print shop boasts one of the largest pinball arcades in San Francisco.

This shop specializes in oddities and Victorian-inspired wonders.

The miraculous hydrant that saved the Mission District in 1906.

A 140-year-old castle with underground caves hidden in San Francisco.

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

Gold Rush-era tombstones line the park's paths.

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

An essential stop before plundering, BYO Cutlass.

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

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.

This 19th-century church is now a popular roller rink.

The black lab that was voted mayor of a California town is forever remembered by a life-size statue.