The mountain that rises above San Giuliano Terme has always been the natural border between the provinces of Pisa and Lucca. Before the famous gallery (commonly known as "Il Foro") was built, wayfarers had to cross the Passo di Dante to reach the opposite side of the mountain. The pass is named after the renowned poet Dante because it's mentioned in the thirty-third canto of Inferno:
"... This man appeared to me as lord and master;
he hunted down the wolf and its cubs upon the mountain
that prevents the Pisans from seeing Lucca.”
The trekking route starts from the aforementioned Amphitheatre Park, is suitable for beginners and lasts about 6 km. The more experienced walkers who wish to continue further can take the paths 00 or 15, as marked by the CAI.