A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

City Council meetings still happen in this historic building, impeccably preserved on the inside.

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

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

The seamy, underground secrets of Portland's criminal past.

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

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

From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

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

In the midst of a residential town in Washington exists a property saturated with one man's artistic creations.

A giant roadside black bird marks the location of this eclectic local mall.

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

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

This super-sized skillet is a replica of a usable giant pan where a woman once skated on bacon.

Home of Jake the Alligator Man, the mummified remains of a cigar smoking, cross-dressing celebrity of the Northwestern coast.

The founder of a utopian religious community based on the Golden Rule laid his son to rest on this grassy hill.

These memorials built by an eccentric bachelor on the side of Interstate 5 cause both wonder and traffic accidents.

The world's largest egg has been cracked a number of times over the years but has been repeatedly replaced.

This bridge provides safe passage for squirrels.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

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