The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

Nuclear reactor created the plutonium used on Nagasaki.

Bonsai trees that are up to a thousand years old.

Tour the original street level of Port Angeles, buried underground in 1914.

Rustic natural hot springs in the deciduous rain forest.

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

This super-sized skillet is a replica of a usable giant pan where a woman once skated on bacon.

Four abandoned towers hidden above the Douglas fir forest in Washington.

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

An abandoned 19th-century hospital now swirling in ghost stories.

Mysterious ancient petroglyphs carved on a glacial boulder at the tip of Bainbridge Island.

Stroll through a wonderland of stupendous moss-covered trees.

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

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

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

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

A cave interior in the shape of the ancient rhinoceros, created by lava cooling around its carcass.

Site of the greatest known waterfall that ever existed.

A Seattle oddities shop brimming with Victorian-era gems and antique curio.

This Seattle curio shop collects and sells haunted items in order to spread wonder one grim artifact at a time.

This quiet neighborhood is also home to a 700-ton rock transported by the last Ice Age.

Every summer West Seattle experiences a housing bloom.

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