Renaissance villa and gardens complete with a tormented colossus.

The glowing blue Nymphaeum of Emperor Tiberius.

Water and windows define this defensive Italian well.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

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

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.

Ruins of a 10th century church tucked away deep in a botanical garden.

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

Largest necropolis in the Mediterranean.

Architectural monsters are devouring this palace's every door and window.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

The underground sanctuary of a mysterious ancient cult.