Travel-Umbria.com

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The Apennines or Apennine Mountains (Italian: Appennini) are a mountain range consisting of parallel smaller chains extending 1,200 km ( about 750 miles) along the whole length of peninsular Italy.
They are mostly verdant. The southern mountains are semi-arid. The eastern slopes down to the Adriatic Sea are steep, while the western slopes form foothills on which most of peninsular Italy's cities are located.
The Tuscan Apennines divide the peninsula between the Po Valley and the plains and hills of Tuscany and Lazio.
A number of long hiking trails wind through the Apennines. The Grand Italian Trail begins in Trieste (north-eastern Italy) and after winding through the Alpine arc traverses the entire Apennine system, Sicily and Sardinia.