The park’s highest mountain (1283 m) overlooks the Limentra di Treppio Valley. Its rugged mountainside features mixed broadleaf forests and replanted conifers that in the particularly steep sections are interrupted by rocky outcrops covered in sparse grassy vegetation and dotted with groups of short and meager European hop hornbeams, manna ashes and beeches. The large open areas along the gentler eastern slope that were once cultivated or used as pastures have since been colonized by clusters of eagle fern and various shrubs (the yellow blossoms of the Scotch broom are especially prominent in spring). Low stone walls mark the boundaries of large fields and lead to groups of stone houses with old cherry, apple and pear trees.