The Alhama below the Sierra de Alcarama Nature · Cerbón, Tierras Altas, Soria Image of Cerbón, not of the place itself. The river Alhama, a tributary of the Ebro, crosses the municipal district at 1,118 metres of altitude to the south of the Sierra de Alcarama, among slopes of holm oak that gave its name to the village's old parish. Photo: Pigmentoazul (CC BY-SA 4.0) What to see and do in Cerbón