The Hidden or Secret Canals of Bologna Is an ancient system of canals that existed centuries ago in the city. They are now hidden by the city infrastructure which has been built over them. On the Via Piella, peer into a tiny window to get a look at the hidden canal, a remnant of the old canal system.
This canal, called Canale di Reno, runs at right angles and underneath the Via Malcontenti, Via Piella and Via Oberdan. The area is called ‘Little Venice’; the entire canal structure was similar to what Venice has today.