Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

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

A monument to the love people have for their pets.

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

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

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

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

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

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

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

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

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

The remains of a ruined mansion memorialize the 1906 earthquake.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

An essential stop before plundering, BYO Cutlass.

A modern mechanical planetary system, part of a 10,000 year clock.

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

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

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

Tiki luxury on Nob Hill.

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

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.