The towns of Bene Vagienna and Lequio Tanaro are situated where the Cuneese plateau is cut into by deep valleys meeting in the middle course of the river Tanaro. Between them, the deep valley of the stream Mondalavia stretches: it is an area of great naturalistic value situated at the edges of what was once one of the main Roman local towns: Augusta Bagiennorum. The presence of the Nature Reserve invites to visit both the archaeological excavations in Roncaglia (free entrance) and the naturalistic and landscape beauties of the area. During the archaeological excavations the ruins of the Quadrangular Towers, the Forum, the Temple, the Civil Basilica, the Baths, the Aqueduct, and several houses have been found.