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

The first fresco Diego Rivera painted in the United States can be found in the former San Francisco Stock Exchange.

Shoot for par over the bodies of the dead on this cemetery-cum-golf course.

One of few lasting examples of the brief octagon craze that developed into folly.

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.

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

After serving in World War II and picking up Apollo astronauts, this aircraft carrier has been turned into a museum overlooking the San Francisco Bay.

The grand, column-fronted, sculpture-adorned home of the ambitious digital library.

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

A winding path built in secret on the edge of the continent.

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

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

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

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

Spiral labyrinth hidden in the hills above Oakland, CA.

Thousands of crosses and markers for soldiers who lost their lives in Iraq and Afghanistan blanket a California hillside.

The final resting place of a woman who never gave up on love.

A huge musical instrument played by the ocean.

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

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