Pilgrimage of San Marcos en Ventillas Activity · Fuencaliente, Sierra Morena, Ciudad Real Image of Fuencaliente, not of the place itself. The romería of San Marcos is held in the hamlet of Ventillas, a district of Fuencaliente in Sierra Morena, on the weekend closest to 25 April. It is a rural romería with an open-air meal and religious events in honour of San Marcos. 25 de abril Photo: Agmora (CC BY-SA 4.0) What to see and do in Fuencaliente