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

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

27-room home built with the fortune of a sugar magnate.

An enormous artwork that colorfully celebrates over 150 years of US military achievements.

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

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

Guns that have been defending San Francisco since 1904.

An enormous illuminated figure dances on the Las Vegas strip.

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 masterpiece in Golden Gate Park by virtue of the artist’s debt.

One of few lasting examples of the brief octagon craze that developed into folly.

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

A man-made island in scenic San Francisco Bay.

The remains of a 12th-century chapter house in Golden Gate Park.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

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.

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

A monument to the love people have for their pets.

Golden Gate Park's historic collection of plants.

This turn of the century masterpiece has a mysterious goaty interloper.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.