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

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

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

Perfect your fly fishing technique on their practice ponds.

A modest reminder of treacherous waters at 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.

Olfactory delights in San Francisco's Botanical Gardens.

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

Golden Gate Park's historic collection of plants.

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

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

Art in the form of a winding, man made crack in stone.

Guns that have been defending San Francisco since 1904.

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

Over 315,000 preserved amphibians and reptiles in jars.

A century and a half of research in the sciences and natural history, still going strong.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

The oldest lawn bowling club in the United States.

An overlooked and unassuming engineering marvel.

This print shop boasts one of the largest pinball arcades in San Francisco.

San Francisco’s century-old Christmas Tree.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

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

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