A snow-white church overlooking the wonderful Tyrrhenian Sea.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

A 15th-century monumental Latin inscription on this house celebrates Lorenzo Manilio's love for Rome.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

This building has a giant piercing through one of its corners.

When this funny little building went up in the 19th century, most people thought it would simply fall over.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

Stuck in the arcade of Casa Isolani are three arrows of mysterious origins.

This building features dozens of faces along its facade, although one is a bit chilling.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

This small church was constructed over the ruins of three temples dating to the Roman Republic.

This medieval church in Rome was almost destroyed following a terrorist attack in 1993.

The sacristy of this church contains remains and relics of members of the Aragonese royal family.

This fountain is dedicated to the workers who perished constructing the Fréjus Rail Tunnel.

A rare example of a medieval house in Rome adorned with a melancholic inscription.

This ancient market is often referred to as the oldest shopping mall in the world.

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

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

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

A special area of the National Archaeological Museum of Naples is located inside a metro station.

Richard Luke Concanen never set foot on American soil.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

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