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

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

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

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

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

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

A man-made island in scenic San Francisco Bay.

Concrete strongholds stand guard over the Golden Gate.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Faceless white figures loom over the city from the rooftop.

An overlooked and unassuming engineering marvel.

Nuclear waste dump site now an environmental sanctuary.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

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

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

A classic advertising icon immortalized in regal bronze.

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

Only hotel where you can legally launder money.

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

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

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

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