Once considered one of the country's finest motte and bailey castles.

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

The longest sculpture trail in the United Kingdom.

Four miles of pipelines form the model of still-functioning retro-tech efficiency.

The Internet Age began with a transmission from this biker bar.

A museum dedicated to restoring vintage aircraft, located at a working airport.

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

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

A humble garage, world-famous for being the epicenter of a technology revolution.

Marta Becket's hand-painted theater in the desert.

This odd California folly seems like it was almost designed to accumulate urban legends.

A man-made island in scenic San Francisco Bay.

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.

California's own majestic geyser is powered by a subterranean volcano.

From the sky, a kaleidoscope of color brightens the grey landscape of the San Francisco Bay.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

The unbelievably opulent home built for an infamous newspaperman.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

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

A giant chess set, minus the psychedelic drug trip.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

The Laureates here get something even more coveted than a Nobel Prize: free parking for life.

The rest of him lived another 61 years and was buried elsewhere.