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

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

These six walrus head statues harken back to a time when this area wasn't far from the oceanfront.

A former hardware store near Yerba Buena is the official home of California's history.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

A modest reminder of treacherous waters at the Golden Gate.

A shining, cold, black organ lies in San Francisco's financial district.

Only hotel where you can legally launder money.

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

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

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

Faceless white figures loom over the city from the rooftop.

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

A man-made island in scenic San Francisco Bay.

A promotional sun clock on the site of San Francisco's great raceway.

A Barbary Coast watering hole built into a Gold Rush shipwreck.

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

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

Golden Gate Park's historic collection of plants.

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

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

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

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