Anello di Lierna
The Circle of Leonardo da Vinci or the Anello di Lierna (in English the "Ring of Lierna") is a footpath and popular hiking trail in the Lombardy region of Italy. It is located on the eastern side of Lake Como. The trail is in the shape of a ring and starts and ends near the town of Lierna. The entrance to the trail is from the Sentiero del Viandante, a longer hiking trail that extends from the Province of Lecco to the Province of Sondrio. The Anello di Lierna is about  long.