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

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

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.

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

A mysterious painting of the self-declared Emperor of the United States watches over a local hof-brau.

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

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

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

This private residence was the template for one of the most beloved television homes of all time.

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

An overlooked and unassuming engineering marvel.

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

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

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