A hidden subterranean installation offers a view of the sky.

A rococo retro-futurist future-rustic vernacular between yesterday’s tomorrow and the future that never was.

An invitation-only museum of items natural and bizarre, arcane and exotic.

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

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

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

An enormous illuminated figure dances on the Las Vegas strip.

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

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.

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

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

Tiki luxury on Nob Hill.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

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

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

The only theatre in the world constructed specifically for sound movement.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A psychedelic labyrinth on the San Francisco bay.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.

The third-tallest statue in the world depicts the "Buddha of Infinite Light," complete with observation deck in his chest.

Largest graveyard in all of Japan surrounds a famous mausoleum.

An unlikely hit, this museum is dedicated to the inventor of instant ramen and cup noodles.