The 1940s structure houses what was once Europe's largest telescope.

This military mausoleum captures the solemn grandeur that most memorials only aspire to.

A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

This incredible second-century sculpture depicts a trio of gods worshipped by the ancient Romans.

A mushroom-shaped outcropping that has come to be the symbol for an entire town.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

This medieval city gate is now a blend of the past and the modern world.

The oldest volcanology research center in the world.

The Emperor Tiberius' palace of debauchery.

The glowing blue Nymphaeum of Emperor Tiberius.

One man's desire to transcend art led to the construction of this outsider chapel.

Balconies that have a most unusual accent.

Walk through a fairytale in Tuscany.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

Bell tower juts out from a village buried under a lake.

Europe’s oldest natural human mummy.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

When a massive landslide hit one of the world's tallest dams it created a tragic environmental disaster.

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