San Francisco's newly reopened hands-on science museum.

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

A pair of pure white felines guard the entrance to a spot of California real estate established as an artist's haven.

A plaque outside the San Jose airport commemorates the insect's arrival to the West Coast.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A giant chess set, minus the psychedelic drug trip.

The headquarters of a secretive order is also a beautifully-designed park.

It took years to decode its mysterious messages.

The largest permanent Monopoly board makes one of the longest games even bigger.

It is locally loved and ridiculed for literally looking like poop.

Three plaques mark the spot where the "forgotten father of broadcasting" worked.

At night, this glittering musical tunnel draws skaters and photographers.

A statue commemorate Tommie Smith and John Carlos's brave protest at the 1968 Olympics, a watershed moment for civil rights.

A lonely monument to the original Silicon Valley tech campus.