Situated at an elevation of 942 m, Posola lies on a plateau near the ridge between the Reno Valley and the Western Limentra Valley. The surroundings of the village are characterized by extensive forests of chestnut, beech, oak, and conifer trees. According to tradition, the name derives from a post station for travelers and merchants, where a stone was ‘laid down’ (posata) to mark a place of rest and refreshment. Highlighting the village’s role as a border point, a distinctive dialect was once spoken here—somewhere between the mountain dialect of Bologna and that of Pistoia.