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

This municipal playground was co-created by the father of one of the most playful characters ever.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

A second generation sun-powered marvel lights up the night.

Everything you always wanted to know about borates is here.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

Dentist's hated concrete colossi are now beloved icons of the community.

Concrete strongholds stand guard over the Golden Gate.

The southernmost outpost of the Russian Empire in colonial America.

This mountaintop beacon is only lit three times a year but shines like some kind of all-seeing eye.

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.

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

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

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

A tree grown from astronaut seeds which were exposed to cosmic rays.

Offering commanding views of the California coastline, this restaurant was a hub for the artists and bohemians of Big Sur.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

One woman's Viking Castle on Lake Tahoe.

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.