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

This Renaissance palace features a unique architectural design and is now home to the Ferrara National Art Gallery.

The oldest church in Mantua was buried for centuries under the facades of other structures.

Tourists to the mountaintop Sicilian town often overlook its ancient fortifications.

A deep mark on the remains of a Roman temple, believed to be left by a legendary warrior.

A long-buried ancient ruin unearthed right in the middle of the city.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

Massive galleon from a box-office bomb docked in Genoa.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

One of the earliest depictions of an Arthurian scene that is shrouded in mystery.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

A dead saint, a deadly poison, and a mysterious holy ooze.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

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

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.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

The walls and streets of the ancient city are peppered with penises.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Geometry and mystery come together in an epic show of octagonal masonry.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.