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

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

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

An overlooked and unassuming engineering marvel.

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

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

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.

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

A "Titanic" superfan changed his name to Jack and set up this strange shrine to the blockbuster, complete with Korean food and Tarot readings.

No matter what it might seem like on film, most scenes filmed on a plane are filmed at this LA studio.

This ultra-modern home clings to the slope of the Hollywood Hills on a precarious stilt.

This collector's home is a constant work in progress.

World's oldest operating science fiction and fantasy club, once home to Ray Bradbury and L. Ron Hubbard.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

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

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

Magical-looking cottages that inspired one of the most famous animated films ever.