- This is about the terrestrial mountain range. There is also a lunar mountain range named the Montes Apenninus.
The Apennine Mountains (Italian: Appennini) stretch 1000 km from the north to the south of Italy along its east coast, forming the spine of the country. They lend their name to the Apennine peninsula which forms the major part of Italy. The mountains are mostly green and wooded, although one side of the highest peak, Corno Grande (2,912 m), is partially covered by the southernmost glacier in Europe. The eastern slopes down to the Adriatic Sea are steep, while the western slopes form a plain on which most of Italy's historic cities are located.
Another line of defence, the Barbara Line, crossed the southern Apennines.