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

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

Half of a house.

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

Gold Rush-era tombstones line the park's paths.

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

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

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.

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

Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

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

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

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

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

Two pillars set 10 paces apart commemorate the "last notable American duel."

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

A gap in the concrete has been transformed into a miniature playground for the mind.

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

This hidden fire lookout offers spectacular views of Sequoia National Park.

This print shop boasts one of the largest pinball arcades in San Francisco.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

This diner's a kitschy dreamland for anyone whose heart is stuck in the 1980s.

This painted marvel is San Francisco's 400-foot ode to urban biking.