Majella National Park protects the main mountain mass and its surrounding valleys, forests, and villages. It is one of the best places in central Italy for walkers who want a more rugged landscape than the better-known Tuscan and Umbrian hills.
The park is large enough that you should not treat it as one stop. Pick a side: Caramanico for gorges and spa-town access, Fara San Martino for the dramatic eastern valleys, or Sulmona and Campo di Giove for western approaches.