One time home to turn of the century explosives, now hidden under the Bay Bridge.

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

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

Once the fastest ship from San Francisco to Tahiti, the Galilee now lays in pieces in three different cities.

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

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

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

The best place in the park to test out your throwing arm.

These subterranean storage areas hold emergency water reserves.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.

San Francisco's first World's Fair, dedicated to the wonders of California.

A monumental cross hides in the trees in Golden Gate Park.

Thirteen trees representing the original thirteen colonies were planted with soil from historic Revolutionary battlefields.

27-room home built with the fortune of a sugar magnate.

An art supply shop holds the secrets of this quiet neighborhood's raucous Barbary Coast past.

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

A miniature view of the park, caught in time.

Guns that have been defending San Francisco since 1904.

A pair of mutilated bronze octopuses slump at the base of the monument honoring California's admission to the U.S.

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

A mysterious painting of the self-declared Emperor of the United States watches over a local hof-brau.

Recovered from the brink of extinction, at home in the Financial District.

A brooding mansion of clinker brick stands out among the Victorian houses of Pacific Heights.

Radioactivity still cause for concern at this urban explorer's paradise.