A computer bug so primitive it was an actual insect.

This elaborate towering structure was once famed for its revolutionary height.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

Where a demonstration led to equal rights for one of California's most marginalized communities.

A winding path built in secret on the edge of the continent.

A modest reminder of treacherous waters at the Golden Gate.

A quiet nook at the top of a little-known hilltop park named after California's first poet laureate.

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

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

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

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.

Golden Gate Park's historic collection of plants.

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

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

A 300-ship graveyard, with a few still visible at low tide.

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

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

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

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

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