Los pueblos sumergidos bajo el embalse de Ullíbarri-Gamboa Historical milestone · Arratzua-Ubarrundia, Cuadrilla de Zuia, Álava Image of Arratzua-Ubarrundia, not of the place itself. The construction of the Ullíbarri-Gamboa reservoir submerged three former population centers of Arratzua-Ubarrundia: Aroma, Esavarri and Mendizábal, permanently underwater ever since. Photo: Basotxerri (CC BY-SA 4.0) What to see and do in Arratzua-Ubarrundia