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

An emporium for the weird, creepy, rare, and just plain gross.

A Victorian-style home known as the “Castle on the Hill.”

The building features one of the last remaining free-floating spiral grand staircases in the U.S.

Unknown to many, this sparkling turquoise lake hides amid Oregon's snowcapped mountains.

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

The tiny church offers succor to travelers driving by, but only eight at a time.

Train debris from the deadliest avalanche in United States history can still be found in the ravine where so many perished.

Granting the right of way to ships over surface traffic since 1917.

The longest and widest floating bridge in the world.

This tiny home built on revenge appears to be scarcely wider than a Volkswagen.

Spanning an elevation of 160 feet and containing 388 steps, this is Seattle's longest staircase.

A beautiful final resting place for some of the noteworthy deceased.

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

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

An allegedly haunted mansion with a tragic, tawdry past.

A whimsical village of unique treehouses resides in a Washington forest.

The second tallest railway trestle bridge in America.

A short hike into the mountainside forest reveals a decaying 1890s town.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

"The House That Love Built" is shying away from "The House That Ghosts Love."

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

The short-lived railroad town in central Oregon has been abandoned since the 1930s.