Take a boat ride on the Canals
Get on one of the boats called Moliceiros and enjoy the city from the level of canals.
Itās a great way to spend about an hour in a relaxing way and to get an overview of what is where in the city.
The student tickets cost about 8 euros while standard price is something about 11 to 15.
Nevertheless, I believe itās worth the cost as you will experience something unique, will hear the stories about the city, various places, architecture, cuisine, and even the economic aspect of the place.