The Sierra de Alba Nature · Las Aldehuelas, Tierras Altas, Soria The municipality hangs down the slopes of this sierra at 1,267 metres of altitude, with the Cidacos making its way among sharp gradients; two protected areas cover some 1,698 hectares of the municipal district. Photo: Sandra crespo calvo (CC BY-SA 4.0) What to see and do in Las Aldehuelas