The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

There has been an astronomical clock on this spot since the 14th century.

Life-sized bronze statues of fictional puppet characters.

Europe's first floating restaurant is home to a hilarious legend.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

An exotic wildlife habitat right off The Strip.

A sprawling cave network created by a lone lava tube.

Spectacular volcanic cliffs along the Crooked River invite hiking, rock climbing, and photography.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

A wall of chewing gum moonlights as collective art.

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

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Boats and fish both find their way through this massive hydroelectric structure.

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

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

A heavenly experience, right here on Terra Firma.

At this airport "microcinema," you can catch a film before you catch a flight.

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

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

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.

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