"The Donut" was built as part of an expensive, ill-fated engineering endeavor.

A fantastic castle rumored to be the birthplace of King Arthur.

Copenhagen's celebrated theme park and gardens.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

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

Single runway interrupted by a busy road that cuts across its middle.

This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.

Once the largest unsupported dome in the world, beating out the Pantheon and St Peters in Rome.

Legend says this demonic carving inside a medieval cathedral was one of Satan's minions.

Once-buried markers show England’s lowest land point keeps getting lower.

Enigmatic tombs and cave dwellings on the outskirts of a rural village.

Ancient mysterious ruts carved in the bedrock.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

The whimsical twist of this spire was either caused by the Devil, an unexpected virgin, or lead.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.