Walk 2,300 feet above the ground on the "Troll's Tongue."

Copenhagen's celebrated theme park and gardens.

Old Danish castle immortalized in Shakespeare's Hamlet.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

A little sculpture with a large wardrobe.

Brussels' favorite peeing boy has a sister.

Meet the bronze beloved pet to a family of famous peeing statues.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

This picturesque mansion has gone from opulent ruin to nature museum.

Huge stone depressions which may have acted as an Incan agricultural experiment.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

A subterranean Holocaust refuge within one of the world's longest cave systems.

A crumbling island fortress that seems to be covered in a field of stone crosses but is simply incomplete.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

This Ecuadorian cemetery is home to a jaw-dropping topiary wonderland.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

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

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.