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

In this century-old literary safehouse, print is alive and well.

The last used bookstore in Downtown San Francisco is one of the smallest bookstores just about anywhere.

A walk down memory lane in the heart of one of San Francisco's most notorious neighborhoods.

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

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

This giant head is all that remains of a once proud statue that survived an earthquake but not a fall off of a wagon.

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

The only visible piece of San Francisco's most famous shipwreck.

A free, public museum dedicated to the fascinating science of sight.

A psychedelic labyrinth on the San Francisco bay.

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

The sole surviving relic of the San Francisco neighborhood cobbled together from old horsecars and streetcars.

Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

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

Two pillars set 10 paces apart commemorate the "last notable American duel."

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

A huge musical instrument played by the ocean.

Tenacious mummies survived dental problems, eternal entombment, and more than their fair share of devastating fires.

A 1920s home transformed into an immersive art experience, where every room is a portal to another realm.

With the touch of a button, you can read a randomly selected short story.

An art supply shop holds the secrets of this quiet neighborhood's raucous Barbary Coast past.

One of the last remnants of the city's Chinese nightclub scene is now a dive bar selling killer mai tais.