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

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

A large instrument played by the wind.

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

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

Of all the origin stories for weed's secret code, this one likely has the goods.

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

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

This 19th-century church is now a popular roller rink.

A huge musical instrument played by the ocean.

A museum befitting the city responsible for supplying the majority of the world's LSD.

A massive volcanic plug is now a protected area that hosts a number of bird species.

Half of a house.

San Francisco's oldest operating hotel, with a Victorian atmosphere and a "haunted" fourth floor.

27-room home built with the fortune of a sugar magnate.

The only theatre in the world constructed specifically for sound movement.

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 mysterious painting of the self-declared Emperor of the United States watches over a local hof-brau.

Its buzzing collection honors vibrator history.

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

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

This frequently-photographed waterfall takes only a short hike to visit.

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

Longtime headquarters of controversial boys' club for the world's wealthiest and most powerful.