San Francisco's first World's Fair, dedicated to the wonders of California.

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

The remains of a ruined mansion memorialize the 1906 earthquake.

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

Once the site of speeding horses, now home to picnickers and public concerts.

A creepy steel gremlin has protected the Bay Bridge since 1989.

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

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.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

Crumbling pink walls and murder memorials preserve the pioneer history of Joshua Tree.

A fake town founded by Western movie stars is now becoming a hip desert community.

A stone copper was sculpted on the wall of the Carlisle Cathedral to honor a local hero.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

An eerie natural formation that looks right back at you.

Meet 'Big Josh,' the 20-foot-tall muffler man.

A music-filled, booze-soaked oasis in the desert.

A bust of the entertainer and politician sits in an alcove at the Palm Springs Airport.

A remote desert lookout offers unparalleled views of the California badlands for those who brave the trek.

Spectacular views await visitors to this lake.

The only arched bridge made of stone on the entire Mississippi River.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

For 150 years one family has been producing the iconic hot sauce on a bayou island made of salt.

A 19th-century Gothic, castle-like statehouse by the Mississippi River.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.