Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

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

A psychedelic labyrinth on the San Francisco bay.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This restaurant's marvelous musical machines include a self-playing violin.

This small oasis of flora and art was created in remembrance of a local auto business owner.

An vast warehouse of everyday treasures in Berkeley, CA.

Check out a shovel along with your Shakespeare.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

An abandoned convention space that has been left to the homeless and the radical.

Playable, historic pinball machines fill this Alameda museum.

A Roman-inspired temple once controlled half of San Francisco's waters.

This beautiful ridge-top trail is dotted by tiny homes apparently built by a group of itinerant fairies.