A cluttered and astounding collection of antiquities and curiosities.

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

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

World's only nuclear reactor operated by liberal arts undergraduates.

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

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

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

This abandoned boat sits on a nude beach, is shaped like a UFO, and is covered in graffiti.

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

The magic's in the hole!

A heavenly experience, right here on Terra Firma.

The world's largest anatomically accurate brain sculpture.

If astronomy had a ghost, it would look like this observatory.

A lesser-known part of the Kinsey Institute is this impressive collection of art, artifacts, and material culture related to human sexuality.

Ornate limestone building now filled with geologic specimens, and more.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

One of the world's earliest skyscrapers.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

An urban forest overtakes what was the greatest failure of utopic urban housing.

This is not your typical jungle gym.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.