Bouncing, delightful, mechanical art at the MIT Museum.

Chevron maintains one “Standard” brand station per state so it doesn’t lose the trademark.

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

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

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A modern mechanical planetary system, part of a 10,000 year clock.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

A huge musical instrument played by the ocean.

Once the site of speeding horses, now home to picnickers and public concerts.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

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

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

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

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

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

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

A popular European tradition makes its way to the states on one of America's most famous bridges.

Elevated freight railway turned wildly successful urban park.

This old mill and former police station now present a world-class collection of Orthodox iconography.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

The world's largest piece of copyrighted artwork.