The church of San Martín del Castañar Monument · San Martín del Castañar, Sierra de Francia, Salamanca Declared a monument on 24 July 1981, it presides over the plaza de la Iglesia of a town whose entire old quarter has been a historic-artistic site since 12 November 1982, with its castle, its cemetery inside the bullring and its mountain houses. Photo: David Perez (CC BY-SA 4.0) What to see and do in San Martín del Castañar