The mummified relic of St. Catherine sits forever on a golden throne.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

The beautiful baroque library of the Hapsburg empire.

Twisted trees shaped by coastal winds make this woodland look like something from a spooky story.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

The ruined doorway is a portal to the building's turbulent and torturous past.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

An otherworldly alpine pasture with its own unique microculture that recalls Middle Earth.

This abandoned Slovenian military barracks has become a punky-political art squat.

A miniature train-ride through Slovenia's largest cave system.

This one-time health resort was used by aristocrats around the world.

This massive subterranean fissure is known as the "underground Grand Canyon."

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.