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

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

The final resting place of one of the most sensational guitar players of all time was created only after his father got the rights to his music.

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

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

This former mining hub holds a surprising abundance of undisturbed relics from the Old West.

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

A home made entirely from scrapped, reclaimed and recycled material in Whitman County, Washington.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

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

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

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

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

A sliver of nostalgia in Seattle's Viretta Park.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

Shoreline strewn with the remains of ghostly fallen trees.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

An obscure waterfall that looks like something out of a fantasy novel.

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

A wall of chewing gum moonlights as collective art.

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

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

A museum dedicated to the history and exploration of both popular music and science fiction.

Stroll through a wonderland of stupendous moss-covered trees.