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

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

Cascading outward, this waterfall creates the appearance of a flowing veil.

In Washington's Yakima Valley lies a town "where dinosaurs roam."

Perhaps the world's only gas station inspired by a political scandal.

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

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

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

Tacoma’s 25-foot coffee pot music spot has served up over 80 years of concrete kitsch.

This municipal sundial has been keeping time along Tacoma's Commencement Bay since 1978.

Tacoma's historic Beaux-Arts train station is now a federal courthouse featuring large-scale glass sculptures by artist Dale Chihuly.

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

A bike being "eaten" by a tree is the real Vashon legend behind popular children's book, "Red Ranger Came Calling."

Walking by this fence is like strolling along a portal to various fictional worlds.

An eclectic collection of wind-powered sculptures made from found and recycled materials.

A comprehensive collection of bonsai set in a beautiful campus.

This 22-acre botanical garden is home to the largest collection of rhododendrons in the world.

The highest point in Washington state is a volcano covered in glaciers.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

Deep into the lower floors of Pike Place, find a date with fowl fate.

A giant Troll lurks under one of Seattle's oldest bridges.

A wall of chewing gum moonlights as collective art.

This working class sculpture pounds his hammer all the livelong day.