A World War II-era sign in Valletta is a reminder of when Malta was besieged so severely that food needed to be rationed.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

This is one of the very few intact windmills built by the Knights of St. John in the island nation of Malta.

These temples are among the oldest free-standing stone buildings in the world.

For over two centuries, this palace served as a residence for the Holy Roman Inquisition's leaders, a courthouse, and a prison.

Valletta’s outdoor theatre stands within the ruins of a 19th-century opera house.

A 30-foot-high stream of chocolate flows continuously at the Lindt Home of Chocolate.

Walk down these stairs to get an underwater view of Switzerland's Lake Zug.

Use a key to unlock this medieval sewer tunnel.

This massive boulder was hurled into a Zurich church when a gunpowder depot was struck by lightning in 1652.

A Swiss amusement park entirely dedicated to the theory of ancient astronauts.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

A pink sandstone column once used in ancient times to measure one's belly after a night of debauchery.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

There has been an astronomical clock on this spot since the 14th century.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Lines on the pillar of Heidelberg's Karl-Theodor Bridge record the dramatic heights of past floods.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

It's good luck to be mocked by this monkey.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

Tiny castle in the middle of the Rhine made you pay to pass.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.