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

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

This teeny-tiny park built by a San Francisco man in 1962 is mostly stairs.

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

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

The neighborhood church casts a breast-shaped shadow that locals have come to call the “two o’clock titty.”

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

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

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

Inside this museum, the history of the Walt Disney Family empire is on full display.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

A hidden subterranean installation offers a view of the sky.

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

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

Standing in for the first ship to navigate the Northwest Passage.

A miniature view of the park, caught in time.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

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

Home to one of the world’s largest collections of model yachts.

The remains of a ruined mansion memorialize the 1906 earthquake.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

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

San Francisco's first World's Fair, dedicated to the wonders of California.