Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

Contractors in this Oregon town have been stamping their names in sidewalks since 1908.

A small, fascinating fire museum hidden in plain sight in an administrative building.

The world's last remaining store of its kind.

A sprawling cave network created by a lone lava tube.

The victims of a free-floating Japanese bombing during WWII are remembered by this stone monument.

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

The wooden airship was the largest flying boat ever built.

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

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

This great stone guardian of the forest is a relic from the land's volatile volcanic past.

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

The trunks of 3,000 year-old trees lurk beneath the surface of this crystal clear lake in Oregon.

This old-fashioned roadhouse's quirky neon sign is as famous as its enormous dumplings.

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

A rugged lava field dotted with molds of the ancient pines that were growing when the volcano erupted.

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

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

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

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

The park preserves a single, rare species of carnivorous plant that spells doom for unsuspecting insects.

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

This nature center has one of the largest collections of native raptors in the Pacific Northwest.