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

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

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

A hidden subterranean installation offers a view of the sky.

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

With the touch of a button, you can read a randomly selected short story.

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

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

The remains of a ruined mansion memorialize the 1906 earthquake.

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

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

Visible below the waves are memorials to the city's Gold Rush dead.

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

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

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

Tiki luxury on Nob Hill.

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

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

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

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

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

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.