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

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

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

Stroll through a wonderland of stupendous moss-covered trees.

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

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

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

This Oregon farm is dedicated to teaching people the professional art of tree climbing.

A massive sea stack famous for its appearance in The Goonies.

Treehouse motel and treehouse-building school.

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

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

This charmingly homemade amusement park has been growing for 40 years.

The magic's in the hole!

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A vintage penny arcade hidden in the back of a fun fair-themed bar.

A private selection of curiosities, carefully curated by a young Brighton local.

This tunnel entrance is built to resemble a grand castle but no one is quite sure why.

The last remaining site of Yoruba worship of the fertility goddess.

A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.

An abandoned railroad tunnel is now filled with bioluminescent bugs.