Take a walk in a recreation of ancient Rome.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

A little sculpture with a large wardrobe.

This floating sculpture of ice is a poignant reminder of nature's power.

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

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

A decomissioned facility where the German "Transrapid" maglev trains were once tested.

The bones of the Biblical Magi traveled to Constantinople and Milan before landing in their current home inside an elaborate golden reliquary in the Cologne Cathedral.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

This historical Netherlands fortress still bears the marks of its single siege.

Incredible labyrinth of man made caves.

The cutest way to stay safe in traffic.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

The 20-mile causeway that separates the Netherlands from the sea.

A road runs through the middle of this small Austrian chapel.

Europe’s oldest natural human mummy.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

This "floating railway" is one of the world's oldest monorail systems.

Wooden pathways run through this rocky landscape, which legend says was created when a dwarven king pulled down his own castle to stop raiding giants.

World's strongest whirlpool.

This solitary convex mirror sculpture at an abandoned ferry station at the edge of a fjord reflects the scenery back at the viewer.

An intricately carved Viking church overlooks a glistening fjord.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.