Bologna is famous for its porticoes, covered walkways that line the streets of the city. These unique architectural features stretch for over 38 kilometers, making Bologna the city with the longest porticoes in the world. Take a leisurely walk along the porticoes and admire the beautiful views of the city. The porticoes also provide shelter from the sun or rain, making them a perfect way to explore the city in any weather. Don't miss the iconic Portico di San Luca, a 3.8-kilometer-long portico that leads up to the Sanctuary of the Madonna di San Luca.