It is a small reservoir, or lake, located on the Campo Ceraso karst plateau, within the Monti Simbruini Regional Natural Park, in the upper Fioio Valley, between Monte Tarino and the Serra di San Michele. This area is characterized by a mountainous landscape with large beech forests, sinkholes, and swallow holes, typical of karst terrain. The area once marked the border between the Papal States and the Kingdom of Naples, and the ancient boundary stones can still be seen today. An unattended refuge is also located near the lake.