The Trapani and Paceco nature reserve, stretching between the two towns, is one of the island’s few remaining wetlands and became a WWF reserve in 1995. The Stagnone reserve, set up in 1984, protects the Lagoon of Marsala and its four islands. The reserves offer splendid sceneries, with their picturesque windmills, and the vast saltpans whose water is tinged with red at sunset.