You absolutely must visit this amazing location for a sunset. You also need to get there AT LEAST an hour before, because even then there are lots of people and it quickly fills up to standing room only. So again, get there about an hour and a half before sunset. Bring a blanket, wine, beer, snacks, etc. There are also multiple vendors walking around selling wine and beer. The vibe is humming, and the romantic ambiance is perfect for a date night. You will see a melting pot of people from all over the world converging on this great park to see a gorgeous sunset fall before you, as you look down river and over a scenic view of the city and it's nightlife springing forward. You can also stand along the bridge over the water as well. Just be mindful of the commuter trains slowly passing behind you. This is the best place to watch a sunset in Porto, and you do not want to skip on this experience.