The Catenaia Alps are a group of mountains that separate the Casentino from the Valtiberina. The highest peak is Monte Castello. The presence of a great deal of water in this area leads to a rich variety of plants including forests of oak, chestnut and beech. This is a great destination for day-trippers and expert hikers alike, with a wide variety of trails for all levels of experience. Don't miss the so-called Prati della Regina (Queen's Lawns) – a huge grass lawn surrounded by beech trees with arrives at 1414 metres in altitude. Breathtaking views can be found on Monte Altuccia (1407m) where you can see the Adriatic Sea on clear days. A little lower down the mountain is a small lake enclosed by lawns and the Casetta del Vaccaio, an old cow shepherds' refuge which is open to visitors. During World War II the Gothic Line passed through here – a strategic point for controlling Arezzo and San Sepolcro. You can still see the trenches that were dug in this area, and explosive devices from the American and German troops are still occasionally uncovered.