It houses the remains of a 17th-century version of the Titanic.

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

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

Home to three historic ships from the age of Vikings.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

Copenhagen's celebrated theme park and gardens.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

This 19th-century Hamptons windmill was once home to modernist painter Agnes Pelton.

Why have you never heard of the second most popular tourist site in New York?

A nearly 100-year-old dining car in upstate New York embodies the golden age of roadside dining.

This natural rock "church" might not be a proper chapel but that doesn't mean it's not beautiful.

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

An abandoned dollhouse factory.

A once grand hotel is being retaken by the wilderness it once capitalized on.

One of the earliest bowling lanes in the U.S. doubled as a sewing school during a time when women had little job opportunity.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."