Golden Gate Park's historic collection of plants.

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

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.

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

A Barbary Coast watering hole built into a Gold Rush shipwreck.

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

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

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

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

The miraculous hydrant that saved the Mission District in 1906.

Amazing meticulous gardens of personal wood carvings, Hydrangea, Canna, and many other flowers.

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

A famous alternative culture epicenter and where Joplin serenaded young hippies.

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

The only visible piece of San Francisco's most famous shipwreck.

A shining, cold, black organ lies in San Francisco's financial district.

One of the last remnants of the city's Chinese nightclub scene is now a dive bar selling killer mai tais.

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

This Cold War siren is one off the last of its kind still standing with its immensely powerful original horn.

"The Reptile Man's" very own roadside zoo features an albino alligator.