Lake Baccio, also called Shallow Lake, is located about 1,500 m high in a valley of great historical and environmental value. In fact near the lake have been found also various archaeological finds.

Of a particular oval shaped, a rarity in the Apennines, the origin of the lake is probably glacial but it is still the subject of studies.

Medium in size and only 9 m deep at the highest point, the lake was a peat bog, but in the 60s the area was reclaimed and enhanced to meet the needs of tourism. Even today, however various marsh plant species grow naturally on the shore and in the water. However the lake is always at risk of disappearance and the preservation and development work continues.

From the lake starts the stream Baccio, one of the tributaries of the stream Tagliole, and all around there is a beautiful beech forest. In the lake it is permitted fishing no kill, but only and exclusively for members of the club.