A tiny red pebble marks what may be the quietest outdoor spot in the United States.

Rustic natural hot springs in the deciduous rain forest.

Former farm staffed by mental patients is now a public park.

The remains of a former logging boom town, crumbled away in the forest.

Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

The site of the Wellington avalanche, one of the America's worst railroad disasters.

The second tallest railway trestle bridge in America.

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

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

This popular bar has been blurring the line between normal and edgy for more than 75 years.

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

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

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

World's largest collection of serial killer artwork and other macabre exhibits.

A one-of-a-kind collection of a unique medium.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Over one million bird-related artifacts await.

A colorful architectural gem in Seattle's uniquely modern Central Library.

A commemorative mural in this tiny Ballard park honors the neighborhood's rich Scandinavian ties, particularly with Seattle's Norwegian sister city Bergen.

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

Seattle's own bad art museum located inside Cafe Racer.

Derelict chemical plant on the North Sea is a beautiful industrial ruin.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.