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

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

A psychedelic labyrinth on the San Francisco bay.

Its buzzing collection honors vibrator history.

San Francisco's newly reopened hands-on science museum.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

One of the last remnants of the city's Chinese nightclub scene is now a dive bar selling killer mai tais.

A shining, cold, black organ lies in San Francisco's financial district.