The path goes up from Province Road 25 to Mt. Castello (226 m), on which you can admire the view over Golfo di Campo, the ruins of an important Etruscan fortress hidden in the vegetation, and a WWII military post.
Before merging with a carriage road the path runs into a sort of tree tunnel; shortly afterwards you'll find two successive junctions, first with path 180 to Poggio and, 500 metres further, with path 121 to Sant'Ilario.
Further informationTappa 3: Grand Trail of Elba