Sentiero Tracciolino is a 12.9-mile loop trail in Verceia, Lombardy, Italy that offers breathtaking views of the valley, Colico, and Lake Como. The route includes a cool tunnel section and takes you through the wild Valley of Rats. It's a moderately challenging trail popular for hiking, mountain biking, and even some history buffs. Plus, dogs are welcome, so bring your furry friend along for the adventure! Just make sure to pack a torch for the dark tunnel part. Happy trails!