America's oldest Italian restaurant is a San Francisco institution.

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.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

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

Only hotel where you can legally launder money.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

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

Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

Concrete strongholds stand guard over the Golden Gate.

Internationally-recognized arts center housed in a century-old former military barracks.

A living time capsule of the 1960s Richardson Bay water-front.

George Lucas donated this park to honor the birthplace of his two biggest movie franchises.

These unusual rooms on wheels are holdovers from the 1960s.

This pun was simply waiting to come to life, and one defense contractor made it so.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

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

Frank Lloyd Wright died a year before construction on his largest public project even began.

A beloved, quirky little fountain featuring a large frog spitting water at a naked boy.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

Beijing's version of Disneyland, completely abandoned, mostly destroyed.

The embalmed remains of the communist leader lie within a custom crystal coffin.