Opera Bosco Museum. Art in Nature is a experimental laboratory-outdoor museum of contemporary art. Founded by the artists Anna Demijttenaere and Constantine Morosin, was inaugurated in 1996. The museum is part of the MUSART, the museum system thematic historic-artistic heritage of the Region of Lazio. Opera forest extends over two hectares of forest in the ravine of the Valle del Treja Park in the town of Calcata. This is a path of installations made with natural materials raw wood.