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

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

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

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

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

Recovered from the brink of extinction, at home in the Financial District.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

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

A man-made island in scenic San Francisco Bay.

San Francisco's most expensive hotel suite includes a secret passageway rumored to have been used by JFK.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Golden Gate Park's historic collection of plants.

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

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

Visible below the waves are memorials to the city's Gold Rush dead.

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

An essential stop before plundering, BYO Cutlass.

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

Tiki luxury on Nob Hill.

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

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

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