Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

America's most famous piece of self-built architecture.

Concrete strongholds stand guard over the Golden Gate.

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

Once the gateway to the utopian dream-village of a Civil War embalmer.

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

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

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

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