Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

This scenic gorge is named after one of the most famous Bigfoot attacks in pseudohistory.

Bonsai trees that are up to a thousand years old.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

A nondescript Seattle restaurant inherited a piece of European history.

Hundreds of hopeful gold miners came here to get rich, but only two years later the small town was deserted.

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

Shoreline strewn with the remains of ghostly fallen trees.

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

A wall of chewing gum moonlights as collective art.

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.

Stroll through a wonderland of stupendous moss-covered trees.

A museum dedicated to the history and exploration of both popular music and science fiction.

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

As a show of peace, a Japanese naval pilot gifted his 400-year-old Samurai sword to the Oregon town he bombed.

The U.S. Navy's last diesel-electric submarine rests half-submerged in the middle of Portland.

According to legend, you must remain completely silent while passing this man-made mound or suffer the consequences.

The largest wooden building in the world now houses a fascinating collection of aircraft.

Home to the only outdoor municipal elevator in the United States.

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

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

This historic steamboat is scuttled just a few hundred feet from where it was built over a hundred years ago.