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

Where the first "expert riders, willing to risk death daily" for the Pony Express were recruited.

A replica of the first public theater built in California.

The California capital city once stood 10 feet lower than it does today.

The only parking meter in the entire town, it is surrounded by 100 free spaces.

The largest drain hole in the world.

If you dial the number in this abandoned office window "Sam Spade’s" secretary will ask you to leave a message.

A sculpture dedicated to Napa Valley's oldest mineral water company.

Art Deco stylings conceal the true nature of this bridge.

A huge collection of rocks, gems, and crystals.

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

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

A monument to the love people have for their pets.

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

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.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.