The oldest volcanology research center in the world.

A surreal botanical garden with an even more surreal tour guide.

This one-of-a-kind archeological site is home to strange prehistoric ruins, the original use of which is still a mystery.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

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

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

This magical-looking island is notorious for the misfortunes suffered by its owners.

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

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

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

2300-year-old Roman road connecting the empire.

Architectureal fantasy quarter of Rome.

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

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The Pope’s secret escape route.

Stalactites and stalagmites in a beautifully lit cave.

The childhood family home of Italian Marxist theorist and politician Antonio Gramsci.

The titular "little arch" near this Italian resort is one of the most popular diving spots in the country.

This cliff-face port is considered a masterpiece of mining engineering.

Japan's longest-running music festival takes place on an isolated butterfly-shaped island.