The Apennine mountains are a mountain system that stretches across the Italian peninsula, from Liguria and Tuscany, Emilia Romagna, Abruzzo, Molise to Calabria.
The width of the Apennines ranges from a minimum of 30 km to 250 km. The highest peak is the Corno Grande in the Gran Sasso Group (Abruzzo) that reaches the 2912 metres above sea level. The Calderone, in the Gran Sasso Group is the only glacier Apennines. The Sicilian mountains can be seen as a continuation of the Apennines. In the eastern part of the island, Mount Etna, with its 3323 m, is the highest volcano in Europe.