Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

The artwork commemorates the many ways 20th-century people perished while on the clock.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

Willy Wonka would love this weird half-a-home.

The world's largest Our Lady of Guadalupe statue overlooks this Ohio sanctuary.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

Hiding the longest subterranean river known in the world.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

Landmark dedicated to the plight of the American Indian in the 21st century.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

The absurd creation is a compulsory destination for selfies in Buffalo.

The world's longest known cave system.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

The only building in Louisville (hopefully) that contains two ancient holy skeletons.

A fiberglass jungle, deep in the wilds of the Cleveland suburbs.

A record-size collection of wild-haired troll dolls tells the story of the mythical creature's roots in Scandinavian folklore.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.