The arch that celebrated the completion of the Lincoln and Victory highways.

One woman's Viking Castle on Lake Tahoe.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

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

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

The former Naval shipyard is open for exploring - mostly.

This mountaintop beacon is only lit three times a year but shines like some kind of all-seeing eye.

The only standing town in the United States that early Chinese Americans built for themselves.

This museum looks at the history of one of America's most famous prisons and most beloved albums.

This former boomtown "island" is now submerged below Folsom Lake.

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

Art Deco stylings conceal the true nature of this bridge.

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.

A replica of the first public theater built in California.

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

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

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

The capitol city's oldest existing cemetery.

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

A working miniature city designed to teach kids about safety and presumably city planning.