An ambiguous ambience emanates from this centuries old leprosy quarantine.

Ruins of a 13th-century fortress perched above a breathtaking Mediterranean bay.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

This town named for the ancient God of War is home to fewer than a thousand people, but it's the birthplace of the Greek Revolution.

Temple complex that once housed the famous statue of Nike.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

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

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

Large Hadron Collider and the Birthplace of World Wide Web.

A historic observatory precariously perched at the "Top of Europe."

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

The hermits of Karoulia protect their asocial lifestyles by living on the vertical face of a treacherous precipice.

An abandoned Byzantine fortress and notorious prison.

This famous archeological mystery may be an ancient example of movable type.

This secret coastal village is studded with pastel-colored houses all piled on top of one another.

This abandoned Greek island was the last active leper colony in Europe.

A little-known park with unusual, half-ruined structures and a mystical energy.

A two thousand year old brothel uncovered in Northern Greece.