The oldest U.S. Government building in California, and it's State Historic Landmark #1.

This 19th century train workshop is a treasure trove of railroad history.

The first U.S. town to secede from the Union, only to vote themselves right back in.

Rising out of miles of farmland, these buttes are sometimes called the world's smallest mountain range.

These unusual houses look like giant boats that washed ashore on a residential street.

A local dialect born in the late 19th century is only spoken in this isolated California valley.

A water tower shaped like a giant coffee pot looms over a small Swedish village in Central California.

An off-grid art installation that encourages its visitors to imagine a world without waste.

More than 700 species live within this murky marvel of a swamp on California's coast.

Home of what was the largest hydraulic mine in the world, producing gold and the first diamonds in the U.S.

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

One of the largest trees of its kind in California.

This rock formation named for its unique shape is one of many that call the Alabama Hills home.

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

Concrete strongholds stand guard over the Golden Gate.

Chewing gum tycoon's memorial lies perched over wife's botanical gardens on Santa Catalina Island.

A ghost town originally established and governed solely by Black Americans seeking a place of their own, free from discrimination.

A massive volcanic plug is now a protected area that hosts a number of bird species.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

27-room home built with the fortune of a sugar magnate.

This giant temperature attraction created some giant electric bills.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

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

Art in the form of a winding, man made crack in stone.