Inauguration of the Camporredondo Reservoir Historical milestone · Velilla del Río Carrión, Montaña Palentina, Palencia Image of Velilla del Río Carrión, not of the place itself. Alfonso XIII inaugurated the Camporredondo reservoir in the upper Carrión in 1930, the first of the great dams of the Montaña Palentina and the start of the hydraulic transformation of all these valleys. 1930 Photo: Goldorak (CC BY-SA 4.0) What to see and do in Velilla del Río Carrión