A playground built by the kids that is a child's wonderland, and a helicopter parent's nightmare.

A celebration of once forgotten materials.

A private home built to resemble the shape of a microscopic creature.

An invitation-only museum of items natural and bizarre, arcane and exotic.

Furniture tries to escape an abandoned building in San Francisco.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

Join the circus for a few lessons to learn clowning, acrobatics, and Chinese contortion.

The miraculous hydrant that saved the Mission District in 1906.

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

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

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

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

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.

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

Tiki luxury on Nob Hill.

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

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

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Its buzzing collection honors vibrator history.

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

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

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A replica that won't float away.