La Bassa de l’Alfacada is a lagoon that was formed as a result of the contribution of sediments from the Migjorn tributary and the growth of the beach. It is a wildlife reserve located in a group of lakes and wetlands that exceed 75 ha. It is an environment of rich landscape and ornithology where there is a great diversity of fauna. It can only be accessed by appointment through the Fundació Catalunya La Pedrera.