The remains of a 12th-century chapter house in Golden Gate Park.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

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

A walk down memory lane in the heart of one of San Francisco's most notorious neighborhoods.

Nuclear waste dump site now an environmental sanctuary.

Tenacious mummies survived dental problems, eternal entombment, and more than their fair share of devastating fires.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

The miraculous hydrant that saved the Mission District in 1906.

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

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

The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.

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

Half of a house.

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

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

A monument to the love people have for their pets.

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

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

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

The remains of a ruined mansion memorialize the 1906 earthquake.

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

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

A hidden subterranean installation offers a view of the sky.

Floating man-made island and upscale restaurant.