The eastern chain consists mainly of the southern part of the Monti Sibillini, the Monti della Laga, the Gran Sasso d'Italia Massif and the Majella Massif. Among them are two national parks: Gran Sasso e Monti della Laga National Park and Majella National Park; and the Regional Park of the Monti Simbruini. Gran Sasso contains Corno Grande, the highest peak of the Apennines (2912 m).