According to Wikipedia, Abruzzo is considered the greenest region in Europe as almost half of its territory, the largest in Europe, is set aside as national parks and protected nature reserves. There are three national parks, one regional park, and 38 protected nature reserves.
The three national park are: The Gran Sasso and Laga Mountains National Park located mostly in northern part of Abruzzo region, bordering with Lazio and Le Marche region; The National Park of Abruzzo, Lazio and Molise in the North – West area of Abruzzo, bordering with Molise and Lazio; and the Majella National Park in the southern part of Abruzzo.
The Gran Sasso and Laga Mountains National Park includes the territory of three regions (Abruzzo, Marche and Lazio), five provinces (L’Aquila, Teramo, Pescara, Rieti and Ascoli Piceno) and forty-four communes; it cover a surface of 150,000 hectares.
The park has been established in 1995, the area holds the highest pick of the Apennine, the Gran Sasso d’Italia, 2912 m, the beautiful Campo Imperatore plateau, the largest in Italy, Lake Campotosto, the largest artificial basin of the continent and the Calderone glacier, the unique in the Apennines and the most southern in Europe. The park contains one of the most biologically diverse areas of Europe. Visiting the Gran Sasso and Laga Mountains National Park means experiencing biodiversity, culture and excellent wine-and-food tradition.
The extent and array of altitude and lithology are reflected in the diversity of landscapes in the Park. At high altitude, where the peaks reach three thousand meters, we find the kingdom of wilderness, with endemic fauna and flora and also glacial relicts.