The River Tordino was born at 2000 meters above sea level between the Gorzano Mountains (2458 meters asl) and Pelone (2259 meters asl), which belo

The river Mavone, the main tributary of the river Vomano, was born on the eastern side of the Corno Grande of the Gran Sasso d'Italia and, during its 16 kilometers journey, receives the contributio

The river Vomano originates in the province of L'Aquila, near the Passo delle Capannelle, on the slopes of Monte San Franco, at about 1200 meters above sea level,

The cave has been discovered in 1573 by the military engigneer Francesco de Marchi who penetrated in a natural cave inside the mountain for half kilometer.