Juniper grove of San Juan de Castellanos Nature · Cobos de Cerrato, El Cerrato, Palencia Image of Cobos de Cerrato, not of the place itself. The site of San Juan de Castellanos preserves a significant juniper wood beside the course of the Río Franco, one of the best preserved stands of Spanish juniper in the eastern end of the Palencia Cerrato. Photo: Rodelar (CC BY-SA 4.0) What to see and do in Cobos de Cerrato