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

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

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

An essential stop before plundering, BYO Cutlass.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

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

Its buzzing collection honors vibrator history.

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

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

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.

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

A huge musical instrument played by the ocean.

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

This lush 12-acre site was once named the finest Japanese garden in North America.