Bernesga Valley and Negrones peak Nature · Cuadros, Tierras de León, León Image of Cuadros, not of the place itself. The municipal district is organised around the Bernesga, which descends from north to south, and around the mountains that close it in, where its many streams rise. Elevations range from the 860 metres of the riverbank to the 1,316 of the Negrones peak. Photo: José Antonio Gil Martínez from Vigo, Spain (CC BY 2.0) What to see and do in Cuadros