Renaissance villa and gardens complete with a tormented colossus.

On rare days, this abandoned castle's gatekeepers open its doors, revealing the eye-popping splendor hidden inside.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Art and armour fill every inch of this rich kid's Italian villa.

Secret refuge and museum of the Duke of Florence.

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

A sculpture serving as an homage to Pope John Paul II.

This is the oldest Roman-made bridge in the city still existing in its original state.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

This basilica is dedicated to two saints, one of which is known more for his famous quote.

Its interior is adorned with some of the best examples of early Christian mosaics.

This large, circular tomb is the final resting place of the first emperor of Rome.

A fairy tale castle in modern Rome.

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

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

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

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

Architectureal fantasy quarter of Rome.

A huge enchanting public park just outside the ancient walls of Rome.

This abandoned Brutalist treehouse is a hidden architectural relic.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

This 16th-century monastery has been turned into a surrealist architecture compound.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Geothermal waterfalls in Tuscany.