This former coal gasification plant found a curious second life as a popular public park.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Boats and fish both find their way through this massive hydroelectric structure.

The Columbia Gorge Hotel sits as a beacon in the Columbia River Gorge and is also said to be haunted.

Where hand-pressed burgers meet low-flying planes — a 1950s drive-in shack at the end of an active runway in the Columbia River Gorge, with Mount Hood on one side and Mount Adams on the other.

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

The only Native American museum along the Oregon Trail, run by the peoples who have lived on the land for generations.

A stunning landscape of bunkers that once stored chemical weapons.

Over 75 historically themed murals grace the walls of a small Washington city.

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

A large wind turbine installation in central Washington State is home to an extensive set of interpretive exhibits.

A former railroad trestle over Interstate 90 has been refurbished for non-motorized traffic on the Palouse to Cascades trail.

The last surviving footbridge in the Yakima Canyon, now a historic landmark, provides access to wilderness west of the Yakima River

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

A monument tucked within a suburban neighborhood commemorates the first nonstop flight across the Pacific Ocean.

A heartfelt tribute to all of the victims of one of the greatest tragedies in United States history.

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

This impressively large collection includes crackers shaped like Jimmy Carter, Mickey Mouse, and more.

One of two observatories in the U.S. that routinely detect gravitational waves.

Nuclear reactor created the plutonium used on Nagasaki.