Boat tour

Hello guys! Im from Canada and will be visiting in may/june. (Porto, Douro Valley, Nazare, Lagos, Lisbon). I saw a couple of boat tours available in thoses city, but which one is a MUST or your favorite. I like the ideas of a tour near the rocks in Lagos, or sunset tour in Lisbon near the bridge. Advice please! Thanksssss🍁🍁🍁🤍❤️