A large instrument played by the wind.

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

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

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

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

Floating man-made island and upscale restaurant.

The only visible piece of San Francisco's most famous shipwreck.

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

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

A huge musical instrument played by the ocean.

This eatery transports diners to a place that no longer exists: East Germany.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

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

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

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

A quiet marker in memory of local men and women lost in WWI.

A hidden subterranean installation offers a view of the sky.

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

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

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.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

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