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

This sandstone mansion was the home of two of Oregon's most important pioneers.

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

A vertically floating hemlock controls the waves and weather at Crater Lake.

Portlandia is the second-largest copper repoussé statue in the United States.

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

A tourist attraction founded around a slumping cabin.

A collection of colorful dinosaurs hidden in an actual rainforest.

Only known mainland rookery of the threatened Stellar sea lion.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

The longest continuous lava tube in Oregon.

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

100-year-old shipwreck you can walk up to at low tide.

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

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

A massive sea stack famous for its appearance in The Goonies.

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

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Two massive rock outcroppings on the Oregon coastline.

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

This charmingly homemade amusement park has been growing for 40 years.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

Home of Howard Hughes' Spruce Goose.

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