Bull stew with potatoes Food and drink · Guadalix de la Sierra, Cuenca Alta del Manzanares, Madrid Image of Guadalix de la Sierra, not of the place itself. On the last day of the patron saint festivities fighting bull meat is stewed with potatoes in cauldrons to be shared out among the residents, a custom shared with other stock-raising villages of the upper Manzanares basin. Photo: Garcellor (CC BY-SA 4.0) What to see and do in Guadalix de la Sierra