This bakery and museum offers tours of the tastes and mythology of Aachen's signature spice biscuit—just don't ask for the recipe.

A meteorite-bounded town in Bavaria.

Its collection commemorates the author of the iconic children's book "Heidi."

Germany's longest suspension rope bridge.

An interactive museum dedicated to preserving and sharing the history of the home computer.

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 mine is home to the largest man-made hole in Europe.

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

A distinctive former power plant turned university lecture hall looks like it could make you breakfast.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

This former steel and coal plant is now a neon-lit industrial fantasia.

Take a walk in a recreation of ancient Rome.

A ruined castle stands atop a hill surrounded by dragon lore.

Part ski resort, part modern art space, this lodge brings giant metal spiders and bloody doors to the Austrian Alps.

This peculiar museum offers hands-on interaction with seemingly intangible principles of mathematics.

A stunning Victorian abbey and walled garden on a lakefront.

The oldest licensed distillery in Ireland.

The ruins of a sixth-century monastery sit on the banks of the River Shannon.

A hugely vast Irish landscape of barren rock that stretches for miles.