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

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

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

The restored and active Victorian-era final resting place of San Francisco.

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

The rustic cabin-like decor of this Arts and Crafts-style church reflects the love of nature central to its little-known theology.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

This painted marvel is San Francisco's 400-foot ode to urban biking.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

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

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

An overlooked and unassuming engineering marvel.

Sitting atop San Francisco's tallest hill, a cross honors the victims of the Armenian genocide.

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

A monument to the love people have for their pets.

The miraculous hydrant that saved the Mission District in 1906.

This 19th-century church is now a popular roller rink.