Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

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

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

A Hawaiian stairway to heaven—that you can't climb.

This grand mansion has starred in everything from Bones to Buffy.

Abandoned concert venue legendary for its rock counterculture.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

An accidentally hidden library containing the ephemeral history of New York.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

An annual celebration of the infamous, unsolved skyjacking.

Providing the soundtrack to the golden years of the Seattle grunge scene.

An American city stranded at the tip of a Canadian peninsula where strict adherence to the "49th parallel rule" became problematic.

The second tallest railway trestle bridge in America.

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

Shoreline strewn with the remains of ghostly fallen trees.

A fine, large-aperture telescope available for public use.

This historic building provides a powerful glimpse into the lives of Japanese Americans forced to relocate during World War II.

A short hike into the mountainside forest reveals a decaying 1890s town.

Essence of hound's tongue and tincture of bloodroot are just the tip of the herbalist iceberg at this beautiful, impressively-stocked apothecary.

"The House That Love Built" is shying away from "The House That Ghosts Love."

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