The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

Copenhagen's celebrated theme park and gardens.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

Double spiral staircases are not unheard of, but they are very rare.

This spire on an Austrian mountain is wrapped around a long spiral slide and has the world's tallest wooden observation deck.

A unique Tuscan hideaway acts as an art mecca as well as a hotel.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

A 30-acre garden inspired by the principles of modern physics.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

This massive underground salt mine now holds a sci-fi theme park in its depths.