This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

This bridge provides safe passage for squirrels.

The first park built over a freeway is a brutalist masterwork.

The highest point in Washington state is a volcano covered in glaciers.

An obscure waterfall that looks like something out of a fantasy novel.

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

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.

A giant Troll lurks under one of Seattle's oldest bridges.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

The wooden airship was the largest flying boat ever built.

No two pieces are exactly the same at Portland's hippo-themed hardware store.

A logging-themed roadside restaurant surrounded by museum-quality machinery and artifacts from the industry's heyday.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

A Roman-style column in Oregon hides a spiral staircase inside.

Mountain known by the Tillamook Tribe as "the place of the supreme deity."

Home of Howard Hughes' Spruce Goose.

Tiny horses tethered to antique rings are scattered around the city.