The tallest bridge in California was constructed for a project that was eventually cancelled.

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

From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

A tribute to the Nirvana frontman hides beneath the bridge that was the singer's beloved hangout spot.

This unique library spans a mighty river.

An enclosed rotunda at the Henry Art Gallery in which viewers can look up and see the uninterrupted sky.

Not far from Mount Rainer, an iron wonderland claims the landscape.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

Quite simply the largest tree in the world (by volume).

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

A midcentury ranch house hides a literal treasure trove of unique rocks and minerals.

This theatre and its amazing marquee harken back to the Golden Age of Hollywood.

This café is dedicated to serving coffee roasted by Native American-owned companies.

The small town of Poulsbo in Washington state is the next best thing to the Kingdom of Norway.

A stunning landscape of bunkers that once stored chemical weapons.

Three generations of intrepid collectors display their curious artifacts in a homemade museum right next to the caves they discovered.

At this 1940s-era neighborhood favorite, you can still drink a cherry phosphate.

A plaque and memorabilia collection mark where A&W got its start.

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

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

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.