Climbing towards Fonte dell'Acqua, the stage enters the more open geography of the Prati del Sirente, which the Park describes as a karst basin of about three kilometres. It overlooks the mid-Aterno Valley and the Subequana Valley, with a small lake, pastures and extensive beech forests at the foot of the Sirente ridge. The Batracofauna lake fits in well into this setting, providing a refreshment area, a natural break and a breathing space along the route. It perfectly illustrates the work done by the Park to preserve the native amphibians, thanks to the presence of small wetlands and ponds at high altitude. On arrival at the Sirente Refuge - reachable from the Sirentina provincial road and designed as a logistical support for mountain tourism - you will end this stage with a vivid sensation of having left the village behind you, and really entering the landscape of the Sirente.