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

Where the alchemists dream of transmuting base metal into gold was actually achieved.

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

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

A Barbary Coast watering hole built into a Gold Rush shipwreck.

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

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.

This print shop boasts one of the largest pinball arcades in San Francisco.

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

Over 315,000 preserved amphibians and reptiles in jars.

A century and a half of research in the sciences and natural history, still going strong.

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

Olfactory delights in San Francisco's Botanical Gardens.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

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

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

A winding path built in secret on the edge of the continent.

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

Inside this museum, the history of the Walt Disney Family empire is on full display.