After 400 years of being closed to the public, this monastery's underground tunnels and secret garden are now a museum.

The seamy, underground secrets of Portland's criminal past.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

Featuring a casually threatening atmosphere along with dessert and coffee to die for.

The magic's in the hole!

A beautiful 62-acre Catholic shrine and botanical garden.

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

Experience the "opulence, grace, and grandeur of Eureka's most famous Victorian Inn."

Commonly referred to as the most photographed Victorian home in the United States.

While it is not equipped to peer into outer space this observatory looks like it was built on the moon.

340 bicycles, 65 feet high.

Learn how dolls are made in this fascinating museum inside a 19th-century mansion.

A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.

Performers, intricate sets, and a real speakeasy tell the story of the 18th Amendment.

This kitschy tavern is also home to rare early editions of "Treasure Island."

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Copenhagen's celebrated theme park and gardens.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

This log cabin gallery is one man's gnarly, hand-carved tribute to his favorite trees.

An unlikely beach paradise of giant sand dunes lies between two lakes just a few minutes from Michigan's cherry country.

Turnip-shaped island just off the Michigan shore in Lake Huron.