Special tunnels built so that frogs won't be killed when crossing the highway.

This 19th century hydroelectric powerhouse was the first of its kind.

On the summer solstice each year, shadows align with a 14,000 square foot painting to reveal a secret message.

Each summer, the migratory bats living beneath the bypass form "batnadoes" at dusk.

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

Puzzling...this tree looks like an assemblage of dismembered monkey limbs.

An eccentric home stands out in an otherwise average neighborhood with mosaics, mini topiaries, and kinetic sculpture.

A replica of the first public theater built in California.

Art Deco stylings conceal the true nature of this bridge.

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

I Street Bridge is the heaviest swinging center bridge in the United States.

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

This 15-story mural celebrates the 50th anniversary of the musician's iconic "At Folsom Prison" album.

The last of a gourmet supermarket chain, this store helped spark California's Food Revolution.

At this 1940s-era neighborhood favorite, you can still drink a cherry phosphate.

The capitol city's oldest existing cemetery.

A tiny survivor of the Donner Party disaster.

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

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

This sandstone mansion was the home of two of Oregon's most important pioneers.

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

10,000 flowered plants bloom in the City of Roses.

Home of Howard Hughes' Spruce Goose.

The wooden airship was the largest flying boat ever built.