The Sentiero Azzurro (Blue Trail; marked No 2 on maps), a 12km old mule path that once linked all five oceanside villages by foot, is Cinque Terre's blue-riband hike, narrow and precipitous. The trail dates back to the early days of the Republic of Genoa in the 12th and 13th centuries and, until the opening of the railway line in 1874, it was the only practical means of getting from village to village.

At the time of writing, the path between Riomagiorre and Manarola (the famed via dell'Amore) and that between Manarola and Corniglia were closed and will possibly remain so until at least 2019. Only very experienced and well-equipped hikers should attempt the current alternative route from Manarola to Corniglia via Volastra.