Part mural and part sculpture, this work of art sits in the middle of the Promenade, as if swimming in a river of asphalt towards the ocean.

The remains of a ruined mansion memorialize the 1906 earthquake.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Shoot for par over the bodies of the dead on this cemetery-cum-golf course.

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

One of few lasting examples of the brief octagon craze that developed into folly.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

Built in 1906, this unique building was the first Hindu temple in the United States.

A winding path built in secret on the edge of the continent.

Gold Rush-era tombstones line the park's paths.

A shining, cold, black organ lies in San Francisco's financial district.

The grand, column-fronted, sculpture-adorned home of the ambitious digital library.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

A promotional sun clock on the site of San Francisco's great raceway.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

A walk through the historic city center, under the streets of Seattle.

The four tall pillars once marked the entrance of the historic Seattle church that fought for women's suffrage and civil rights.

A wall of chewing gum moonlights as collective art.

This working class sculpture pounds his hammer all the livelong day.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

A dozen U.S. presidents have stayed at the historic resort, which was known as James Buchanan’s “Summer White House” from 1857-1861.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.