Which park in Spain is bigger Guadarrama National Park or Atlantic Islands of Galicia National Park?
Guadarrama National Park Sierra de Guadarrama National Park (in Spanish: "Parque Nacional de la Sierra de Guadarrama") is a national park in Spain, covering nearly 34,000 hectares, the fifth largest in Spain's national parks system. The Guadarrama mountain range ("Sistema Central") contains some ecologically valuable areas, located in the Community of Madrid and Castile and León (provinces of Segovia and Ávila). The law that regulates the recently approved national park was published in the BOE in  26, 2013 (2013--) .
Cantabrian Sea The Cantabrian Sea is the coastal sea of the Atlantic Ocean that washes the northern coast of Spain and the southwest side of the Atlantic coast of France; it represents the south area of the Bay of Biscay. It extends from the cape Estaca de Bares in the province of A Coruña, to the mouth of the Adour river, near the city of Bayonne on the coast of the department of Pyrenees Atlantiques in French Basque Country. It washes of coastline shared by the Spanish provinces of A Coruña, Lugo, Asturias, Cantabria, Biscay and Gipuzkoa, and the French area of Labourd.