Started nearly 100 years ago, this science experiment just keeps on going, ever so slowly.

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

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

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

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

An extraordinary mixture of natural beauty and man-made phenomena.

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

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

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

Hundreds of hopeful gold miners came here to get rich, but only two years later the small town was deserted.

A famous hotel houses an impression collection of mini dioramas and giant doll houses.

This historic Victorian hotel has a scandalous history of affairs and murder.

An old World War II hangar holds 20 vintage aircraft and the rare opportunity to take a ride in a 1940s warbird.

People come from across the globe to swim in this lake believed to have healing properties.

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

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

The longest and widest floating bridge in the world.

This former coal gasification plant found a curious second life as a popular public park.

A museum dedicated to the history and exploration of both popular music and science fiction.

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

A frozen relic of Seattle's hydroelectric boom is now a teaching facility for future engineers.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

Hollowed out cedar log tubs set in an ancient towering forest.

This charmingly homemade amusement park has been growing for 40 years.