A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

A museum befitting the city responsible for supplying the majority of the world's LSD.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

Longtime headquarters of controversial boys' club for the world's wealthiest and most powerful.

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

An art supply shop holds the secrets of this quiet neighborhood's raucous Barbary Coast past.

A psychedelic labyrinth on the San Francisco bay.

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

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

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

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

A grove of "candelabra redwoods" deep in California's Lost Coast.

One of the largest Buddhist communities in the West sits on the site of an old hospital.

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

Where the polar bear watches over everything, and every drink is a double.

It's not your typical library, memorial, or book store.

Offering commanding views of the California coastline, this restaurant was a hub for the artists and bohemians of Big Sur.

A tree grown from astronaut seeds which were exposed to cosmic rays.

Hopeless romantics will swoon over the sweet story behind this bright and colorful home.

Every year, over 25,000 monarchs overwinter in Pacific Grove.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

Home to the "Circus" trees created by Axel Erlandson.

A strange house built only at night, with rumored mystic inspiration.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.