A Roman-inspired temple once controlled half of San Francisco's waters.

A Wild West saloon that helped define a generation of psychedelic rock.

On the side of Highway 50 East, between Carson City and Dayton, Nevada, sits a giant metal spider made from a vintage Volkswagen Beetle.

One woman's Viking Castle on Lake Tahoe.

A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."

100-year-old shipwreck you can walk up to at low tide.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

This coastal rock formation resembles a churning cauldron at high tide.

This massive redwood tree has a drive-thru tunnel carved out of its trunk.

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

Canyon walls shrouded in ferns.

Commonly referred to as the most photographed Victorian home in the United States.

This Taoist temple is the oldest continuously used Chinese temple in California.

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

The flow from this waterfall sometimes comes out of springs below its rim.

A large lava tube that can be walked through with no special equipment.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

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

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

This corn maze so big you may want to pack a lunch, and possibly a flaregun.

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

A tribute to the life and work of the beloved "Peanuts" cartoonist.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

'Cause the fence start shaking, the earth was quaking.