This modest marker near Notre Dame identifies the very center of Paris.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

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

Paris' linguistic guide to the international language of, yes, love.

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

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

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

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

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

A sweet symbol marks the place where torturous executions were once carried out.

The final resting place of soldiers' loyal canine companions.

360° views of the city plus five floors of optical illusions and hands-on science.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The beautiful baroque library of the Hapsburg empire.

Thousands of well-dressed mummies below a monastery.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The first declared National Monument in the United States.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

Eighteen miniature death-scene dioramas.

France's most famous cemetery, with some of its most curious tombs.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The world’s first penitentiary, meant to be humane, drove men insane.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.