A monument to the love people have for their pets.

A promotional sun clock on the site of San Francisco's great raceway.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

A library and museum dedicated to typography.

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

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

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

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

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

In this century-old literary safehouse, print is alive and well.

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

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

A modern mechanical planetary system, part of a 10,000 year clock.

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

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

An essential stop before plundering, BYO Cutlass.

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

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

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

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

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

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.