A collection of 20th-century automata, penny arcade games, and musical contraptions.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

At night, a grove of towering redwood trees growing through the pavement block out all light from the so-called “Dark Park” of Madrone Avenue.

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

A psychedelic labyrinth on the San Francisco bay.

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

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

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

The taxidermied remains of the "last wild grizzly bear in California" and of the symbol of the state of California.

Olfactory delights in San Francisco's Botanical Gardens.

San Francisco’s condensed garden of incredible plant growth.

This partially buried wreck is one of the most complete of its kind but is only revealed when the sea allows.

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

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

A rough granite monument marks the spot where Europeans first caught sight of the San Francisco Bay.

Another of California's unused Cold War missile defense complexes has become a graffiti gallery.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

A 140-year-old castle with underground caves hidden in San Francisco.

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

Golden Gate Park's historic collection of plants.

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

An artsy hidden staircase leads to breathtaking views of San Francisco.

Abortion, prohibition, religion, war, and fear all play a part in the history of this idiosyncratic Pacifica castle.

Over a century old, this restored Victorian building is surrounded by a lush garden filled with rare palms.