Castañar de Balsa Grande y Castaño de Constantino Nature · Paterna del Río, Alpujarra Almeriense, Almería Image of Paterna del Río, not of the place itself. The Balsa Grande chestnut grove, covering 72 hectares, is the easternmost in Andalusia. Nearby grows the Castaño de Constantino, a remarkable tree over 10 meters tall with a base circumference of 6.6 meters. Photo: Schumi4ever (CC BY-SA 4.0) What to see and do in Paterna del Río