Medieval Founding of Campos del Río Curiosity · Campos del Río, Río Mula, Murcia Image of Campos del Río, not of the place itself. The first written references to the municipality date from 1257, when a charter granted by Alfonso X the Wise at Alpera ceded Campos as a village dependent on Mula; before the Castilian reconquest of 1243 it was a settlement of Arab origin. Photo: Galopax (CC BY-SA 4.0) What to see and do in Campos del Río