The ghostly remains of an accidental sea.

Towering basalt columns, a creation of fire and ice.

The rocks in this arid basin leave trails of movement behind them.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

The longest and widest floating bridge in the world.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

This remarkable collection devoted to the study of fish includes 1 million preserved specimens from all around the world.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

Where else would a linchpin of post-colonial Native American cuisine anchor the menu but a museum?

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

The first park built over a freeway is a brutalist masterwork.

A museum devoted entirely to the rattlesnakes and snake-related art.

A museum dedicated to the alleged Roswell Incident.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Travel through the wholesome amusements of yesteryear at this charming miniature village.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The king of U.S. high points towers over every other peak on the continent.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

Over 75 historically themed murals grace the walls of a small Washington city.

An obscure waterfall that looks like something out of a fantasy novel.