The National Park of the Atlantic Islands comprising the Cies Islands , Ons , Cortegada and Sálvora , all in the Galician Rías Baixas .The islands , rocky nature , are full of cliffs facing the Atlantic Ocean and spectacular beaches and dunes on the inside , in the estuaries.In its spectacular surroundings they contain one of the most important colonies of marine birds found in Spanish territory. Here you can find one of the largest colonies of yellow-legged gull a...