Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

The hulking remains of the Leesburg Lime Company Kiln lie dormant behind a historical marker close to the W&OD trail.

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

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

Art Deco stylings conceal the true nature of this bridge.

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

The capitol city's oldest existing cemetery.

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

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

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

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

These subterranean storage areas hold emergency water reserves.

This painted marvel is San Francisco's 400-foot ode to urban biking.

A monumental cross hides in the trees in Golden Gate Park.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

A tribute to the artist and activist who created the rainbow pride flag.

Sitting atop San Francisco's tallest hill, a cross honors the victims of the Armenian genocide.

A man-made island in scenic San Francisco Bay.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

In this century-old literary safehouse, print is alive and well.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

San Francisco's newly reopened hands-on science museum.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Tiki luxury on Nob Hill.