The miraculous hydrant that saved the Mission District in 1906.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

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

Nuclear waste dump site now an environmental sanctuary.

Golden Gate Park's historic collection of plants.

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

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

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

An overlooked and unassuming engineering marvel.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

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

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.

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

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

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

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

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

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

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

Tiki luxury on Nob Hill.

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

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