Festivities of invierno de La Muela Activity · La Muela, Valdejalón, Zaragoza Image of La Muela, not of the place itself. La Muela's winter festival includes the bonfire of San Babil on 24 January, in a municipality that received a settlement charter from Jaime I in 1259 and is today known for its wind farms. Photo: Augustin Liviu (CC BY-SA 3.0) What to see and do in La Muela