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

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

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

Two massive rock outcroppings on the Oregon coastline.

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

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.

Home of Howard Hughes' Spruce Goose.

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

A beautiful 62-acre Catholic shrine and botanical garden.

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

This famous bridge twisted itself into oblivion, but not for the reason you might think.

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

At 207 feet, one of the world's longest continuous escalators.

The largest earthwork effigy in the world.

This ominously named New Jersey street seems to be attracting over-the-top legends of its own making.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

The library of every book lover's dreams.

Golden plates containing what would become the Book of Mormon were believed to be buried on this New York hillside.

Twice a day, the water of the Petitcodiac River flows upstream in a surfable wave.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

An ancient Viking village in North America that predates Columbus by 500 years.

The ancient latrines of the Greeks, in all their public glory.