This unassuming home was once “grand central station” for the Underground Railroad.

Covered in tens of thousands of coats of paint, this Indiana attraction holds a world record all its own.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

Every drop of water in this 27-mile long reservoir was pumped up from the Columbia River using power from Grand Coulee Dam.

Site of the greatest known waterfall that ever existed.

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

An outsider art duo's yard has been turned into a whimsical public gallery.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

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

A heartfelt tribute to all of the victims of one of the greatest tragedies in United States history.

A narrow fjord-like lake, the third-deepest in the United States, runs for over 50 miles into the Cascades of Washington state.

The colorful, smiling concrete silos of Vancouver.

Bird dung painted this huge boulder which in turn inspired the name of a city.

Defaced since the early 80s, this bridge has become local icon to the metalheads and residents of the city.

An electrifying collection of gadgets and literature from the 16th through 20th centuries.

Like your grandma's attic—if your grandma were a little weirder, extremely well-traveled, and had a great eye for art.

Stones speckled along Harris Avenue reveal hidden nuggets of the past.

The cardinal directions, set in stone.

This dilapidated ship carcass covered in trees is a striking sight.

On the edge of this small Washington Park, a piece of the Earth's mantle has come to the surface.

This historic bridge connects Whidbey Island to Fidalgo Island across whirlpool-filled waters.

Sleep beneath the big screen at this old-school movie theater.

City Council meetings still happen in this historic building, impeccably preserved on the inside.

Built in 1890, this is the last remaining wooden fire bell tower in the United States.