Botijeras Festival Activity · Dueñas, El Cerrato, Palencia Image of Dueñas, not of the place itself. On 15 August the town celebrates its Fiestas Botijeras in honour of the Virgin, a name that comes from the legend that gave the residents the nickname of botijeros and that still marks the summer in Dueñas. Photo: Fundación Joaquín Díaz (CC BY-SA 3.0) What to see and do in Dueñas