Jalón river plain in La Muela Nature · La Muela, Valdejalón, Zaragoza Image of La Muela, not of the place itself. La Muela, at 598 metres of altitude above the Jalón valley, received a settlement charter from Jaime I on 5 February 1259. Today it is also known for its wind farms, to which it devotes one of its three local museums. Photo: jesus martinez (CC BY 2.0) What to see and do in La Muela