The name derives from the homonymous valley, almost completely reclaimed, Falce Valley: it is the last reclamation intervention of the whole national territory.It is the only wetland located at the southern limit of the Mesola Wood and has a variable salinity: here the waters of the Sacca di Goro mix with those coming from the hinterland. It has an area of 200 hectares and consists mainly of marsh reeds. From the embankments you can see the mouth of the Po di Volano, with its characteristic scanni. Here you can observe a wide variety of typical wetland avifauna.