The Mayos of Castellar de Santiago Activity · Castellar de Santiago, Campo de Montiel, Ciudad Real Image of Castellar de Santiago, not of the place itself. On the first of May humorous messages aimed at neighbours appear painted on the façades of Castellar de Santiago, a singular tradition of the municipality. 1 de mayo Photo: Rodelar (CC BY-SA 4.0) What to see and do in Castellar de Santiago