A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A huge musical instrument played by the ocean.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

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

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

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

Treehouse motel and treehouse-building school.

A chance to sleep among the firs and pines of the Oregon forest.

A whimsical village of unique treehouses resides in a Washington forest.

Unknown to many, this sparkling turquoise lake hides amid Oregon's snowcapped mountains.

The trunks of 3,000 year-old trees lurk beneath the surface of this crystal clear lake in Oregon.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

A small, fascinating fire museum hidden in plain sight in an administrative building.

The short-lived railroad town in central Oregon has been abandoned since the 1930s.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.