Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

This skeleton-filled altar piece served as a backdrop to one of the most iconic scenes in "The Sound of Music."

Germany's tiniest institution of education.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

This massive statue is the personification of Bavaria and the first colossal statue of the modern period composed of bronze.

From Nazi chemicals to the CIA, this architectural marvel has played a fascinating role in German history.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

The sweet story of how American cargo planes became known as "Candy Bombers" during the Berlin Blockade.

The fairy tale castle of the "fairy-tale king."

World's largest barrel containing an inn.

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

Constructed along the shores of Lake Zurich, this pavilion is a walk-through work of art.

This artistic fountain display pays homage to this area's theatrical history.

This Late Gothic building that once housed Erasmus is now known as the filming location of "Suspiria."

This medieval cathedral houses stained-glass windows featuring saints and pretzels.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

A stonemason's hilarious revenge came in the form of this peculiarly positioned gargoyle.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

A medieval church built up to defend its village.

A trash dump made beautiful by nature's power.

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.