The Merdancho beneath the Rodadero Nature · Aldealices, Almarza, Soria Image of Aldealices, not of the place itself. The river Merdancho, a tributary of the Duero, waters the 6.33 square kilometres of the municipal district, south of the Sierra del Rodadero; 63 hectares of the municipality belong to the Oncala-Valtajeros site. Photo: Pablo Cabezos from Mostoles, España (CC BY 2.0) What to see and do in Aldealices