Monte Casoli di Bomarzo Nature Reserve was established in 1999 with L.R. 30. At the moment, it covers an area of 285 hectares (the enlargement to over 700 hectares is on the program), in the Municipality of Bomarzo. The landscape of the protected area, strongly influenced by the local geological features, is characterized by woodlands alternating with plateaus which were used in the past as pastures, cultivated areas, and more or less deep valleys. However, the whole area is important not only for its naturalistic features, but also for its great historical and archaeological value.