The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

Romans built the world's tallest artificial waterfall in 271 BC.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

A fairytale island floats in the middle of Italy's little-known Lake Orta.

The location of the last witch trials of Italy, known as "The Salem of Europe."

Giant, pink stuffed rabbit on an Italian mountain.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

Pilgrimage site for star-crossed lovers.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

Stalactites and stalagmites in a beautifully lit cave.

Renaissance villa and gardens complete with a tormented colossus.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A submerged archeological park still holds the wonders of a Roman Sodom.

Architectureal fantasy quarter of Rome.

A 16th-century horror show built in a lovely Italian garden.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.