Collective dedicated to restoring steam engines.

Social saloon from a scrapped trans-Pacific 19th century steamer.

The final resting place of the Emperor of the United States and Protector of Mexico.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

Once the gateway to the utopian dream-village of a Civil War embalmer.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

Radioactivity still cause for concern at this urban explorer's paradise.

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

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

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

A 140-year-old castle with underground caves hidden in San Francisco.

Condemned US Navy seaplane control tower turned officers’ club sits atop Yerba Buena Island.

A monumental cross hides in the trees in Golden Gate Park.

A huge musical instrument played by the ocean.

The oldest lawn bowling club in the United States.

A whimsical antique shop with a strong air of mystery, filled with items from ages, and what feels like worlds, past.

This shop specializes in oddities and Victorian-inspired wonders.

The miraculous hydrant that saved the Mission District in 1906.

One of few lasting examples of the brief octagon craze that developed into folly.

Faceless white figures loom over the city from the rooftop.

A brooding mansion of clinker brick stands out among the Victorian houses of Pacific Heights.

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

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

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