The plateau is covered by a semi-natural forest of hornbeams and oaks. An amphitheatre garden is cultivated with hornbeams, lime trees and white mulberry trees. These include 300 veteran oaks, beeches, hornbeams, ash (Fraxinus), and sweet chestnut trees. There are many hornbeams, and other trees include oak and ash. Hornbeams yield a very hard timber, giving rise to the name "ironwood". Hornbeams are hardwood trees in the flowering plant genus "Carpinus" in the birch family Betulaceae.