In 1990, the Museum of the Mesola was inaugurated, curated and realised by the Provincial Administration of Ferrara, which is located inside the Castle of the Mesola. This place, built on a design by Marco Antonio Pasi at the will of Alfonso II in the middle of the fifteenth century, has the aim of spreading the naturalistic and environmental knowledge of the Po Delta. Some rooms of the museum are dedicated to the description of the geomorphologic aspects, the flora and the fauna of the fresh and salt water valleys and of the Boscone della Mesola. A large plastic wall of the exhibition area illustrates in brief the altimetry, while the audiovisuals, the aquariums, the laboratory and the naturalistic library accompany the visitor in his discovery phase. An important area is reserved for the Mesolla deer, an animal that has a general course, a peculiar physical aspect and behaviour. The Torre dell'Abate, built by Alfonso II, contains historical cartographic reproductions of the Mesolan territory and an interesting scale model of the tower that reproduces the function of the Venetian gates in the regulation of the flow of water.