Commemorating the landing of William of Orange with his European army on their way to the Battle of the Boyne.

These engineering masterpieces are a dominant feature of the Belfast skyline.

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

This massive monument has been telling the time for 150 years—at a slight angle.

The commemorative stone column conceals a secret laboratory.

A museum that chronicles the history of the Nuremberg Trials for Nazi war criminals in the building where the trials were once held.

The final resting place of one of Germany's most accomplished Renaissance men.

This strange sculpture depicts a giant nightmare hare crushing a man to death beneath its colossal bulk.

An ornate sculpture of an ox in repose marks the former entrance to Nuremberg's medieval meat market, which was destroyed during World War II.

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

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

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

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

The narrowest street in Paris.

This demon atop the Notre-Dame de Paris looks utterly bored.

The video game-themed street art first popped up in the French city.

This recessed garden protects thousands of mountain plants by creating its own microclimates.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This lesser-known Frank Gehry building houses a treasure trove of cinema history.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.