Tiki luxury on Nob Hill.

Olfactory delights in San Francisco's Botanical Gardens.

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

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

Its buzzing collection honors vibrator history.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

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

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

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

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

An artsy hidden staircase leads to breathtaking views of San Francisco.

A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

A gap in the concrete has been transformed into a miniature playground for the mind.

The Flatiron Building's storied West Coast cousin is a lot more into religion.

An abandoned convention space that has been left to the homeless and the radical.

An art collective teaching the more fiery, metal-y art forms.

This bakery sits on the site of the Black Panther Party's first headquarters.

Odd stone and concrete monuments in the "Poet of the Sierras" eclectic folly garden.

A hardware store Buddha statue installed to deter vandalism wound up attracting Vietnamese immigrants who came to pray.

A unique piece of graffiti offers a little slice of local history and mystery.