The Gran Sasso is a mountain.
Originated about 6 million years ago, its 2914 meters peak, is the highest of central Italy’s Apennine. Among its walls, still resists the Calderone glacier, traditionally considered the southernmost in Europe.
Altitude, rocks composition, the type of suffered erosions, make it very similar to the mountains of the Dolomite Alps groups.
Thanks to its elevation, which is much higher than the surrounding chains, the massif is visible from all the main peaks of central Italy. On particularly clear days even from Dalmatians mountain range.