The Parco del Delta del Po is a regional park encompassing one of Europe’s largest wetlands and a pair of alluring lagoons, the Valli di Comacchio and Valle Bertuzzi. With more than 300 bird species nesting or passing through the area, it’s a paradise for ornithologists. In late April and early May, Comacchio hosts the International Po Delta Birdwatching Fair, the largest event of its kind in Europe.