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

Its buzzing collection honors vibrator history.

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

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

A crumbling Beaux Arts monument to the Bay Area's age of rail.

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

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

9,000 square feet of vintage and modern mechanical toys, dioramas & sideshow curiosities.

An amazing collection of fantastic reptiles, amphibians, spiders, and insects.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.