The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

World's largest porcine hairball sits in a collection maintained by Benedictine monks.

The wooden airship was the largest flying boat ever built.

Home of Howard Hughes' Spruce Goose.

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

A midcentury ranch house hides a literal treasure trove of unique rocks and minerals.

Nestled between a college and a golf course, the garden is home to more than 2,500 rhododendrons.

Inside a humble hangar is some of the best roller derby the world has to offer.

10,000 flowered plants bloom in the City of Roses.

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

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

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

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

Tiny horses tethered to antique rings are scattered around the city.

The magic's in the hole!

Featuring a casually threatening atmosphere along with dessert and coffee to die for.

These machines have been collecting dust for decades.

No two pieces are exactly the same at Portland's hippo-themed hardware store.

Portland had a unique approach to Cold War-era protections.

A heavenly experience, right here on Terra Firma.

Statues of Ramona Quimby, Henry Huggins, and Ribsy the dog in the park where their adventures "really happened."

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

A beautiful 62-acre Catholic shrine and botanical garden.

The oldest apple tree in the Pacific Northwest.