An ironwork masterpiece, the Dom Luis bridge was once considered the longest iron arch in the world. The bridge connects the center of Porto with Cais de Gaia where you will see the stunning skyline of the city.
You can cross the bridge either by metro, which uses the upper level of the structure or go to the lower lever where cars and pedestrians can get through. Your local guide will advise you with the best way to do it, plus they will give you the background history of the structure and what attractions you can see on the other side. Without a doubt this is one of the top attractions of Porto and part of the daily life of the locals, crossing it will make you feel part of the city.