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

Over 315,000 preserved amphibians and reptiles in jars.

This partially buried wreck is one of the most complete of its kind but is only revealed when the sea allows.

The remains of a ruined mansion memorialize the 1906 earthquake.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

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

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

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.

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

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

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

A huge musical instrument played by the ocean.

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

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

This residential door allows San Francisco muggles a glimpse at the wizarding world.

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

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

The neighborhood church casts a breast-shaped shadow that locals have come to call the “two o’clock titty.”

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

This Japanese treats shop may have been the first business to mass-produce fortune cookies in the United States.

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

Olfactory delights in San Francisco's Botanical Gardens.

At night, a grove of towering redwood trees growing through the pavement block out all light from the so-called “Dark Park” of Madrone Avenue.