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

The middle finger of modernity.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

The mysterious “claw marks” said to be left by the Devil on Pisa’s famous cathedral.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

A remarkable feat of Victorian engineering across the Firth of Forth.

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

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A set of medieval stained-glass windows tell the gruesome story of a Viking siege.

The most loyal of little dogs, or a Victorian era publicity stunt?

A six-ton wedding present for the King of the Scots.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

This small museum in a 17th-century building honors three iconic Scottish writers.

This painting of a beloved dog will be on display at the Scottish National Gallery at long as the museum exists.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

When this funny little building went up in the 19th century, most people thought it would simply fall over.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.

This building has a giant piercing through one of its corners.

Explore the quarry where the marble was sourced for Michaelangelo's David.