This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

A mysterious monument covered in a binary code marks the heart of tech.

A lonely monument to the original Silicon Valley tech campus.

Oakland's beautiful monumental cemetery.

Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.

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

The capitol city's oldest existing cemetery.

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

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

Art Deco stylings conceal the true nature of this bridge.

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

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

A replica of the first public theater built in California.

A mesmerizing disco ball-like sculpture along the Sacramento River Walk.

Dentist's hated concrete colossi are now beloved icons of the community.

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

Outsider art or homage to aliens?

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

This graffiti-covered bridge is the quintessential vision of a place for disillusioned youth to escape the complexities of burgeoning adulthood.

Seven ceramic sculptures are scattered around this California college campus.

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

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

A quiet nook at the top of a little-known hilltop park named after California's first poet laureate.

A hardware store Buddha statue installed to deter vandalism wound up attracting Vietnamese immigrants who came to pray.