Muga River Nature · Castelló d'Empúries, Alt Empordà, Girona A river rising in the Pyrenean foothills and flowing into the Gulf of Roses after passing through Castelló d'Empúries, feeding the wetlands and lagoons of the Empordà. Photo: The original uploader was Jordicollcosta at Catalan Wikipedia. (CC BY-SA 3.0) What to see and do in Castelló d'Empúries