Upper Jamuz valley Nature · Quintana y Congosto, La Bañeza, León A municipality of 88.5 square kilometres at some 815 metres of altitude, in the comarca of Valdejamuz, where the river opens a corridor of vegetable plots and poplar groves between hills of holm oak and scrub of rockrose and thyme. Photo: Tbtbtbt (CC BY-SA 4.0) What to see and do in Quintana y Congosto