The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

An entire town preserved as a historic landmark.

With over 340,000 artifacts and counting, there is something for everyone, often called the "Smithsonian of the West."

A 6-mile-long lake created by an apocalyptic seismic event and the deadly chain reaction that ensued.

The only road through the heart of Glacier National Park.

This amazingly preserved Gold Rush town is a historian's dream.

New fungal and bacterial species call this deadly lake home.

These memorials built by an eccentric bachelor on the side of Interstate 5 cause both wonder and traffic accidents.

A glimpse into the "Logging Capital of the World" at a time when there was far more forest and far less machinery.

This playground sculpture of an icon from the past is dedicated to the children of the future.

The world's largest egg has been cracked a number of times over the years but has been repeatedly replaced.

Perhaps the world's only gas station inspired by a political scandal.

A fine, large-aperture telescope available for public use.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

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

An extraordinary mixture of natural beauty and man-made phenomena.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

This little slice of the Netherlands in the Pacific Northwest blooms in a rainbow of color each spring.

The unique circular corral belonging to the “Cattle King” of Oregon.

Make it an offering.

A stunning landscape of bunkers that once stored chemical weapons.

The wooden airship was the largest flying boat ever built.