There are places in this town where even the air and the clear light are so seductive that one must take a break, breathe deeply and look around as if expecting Spring to suddenly sprout round the corner. One of these so special areas is La Plaza de San Martín (San Martin's Square) where the Torreón de Lozoya ( Lozoya Tower ), prominent among the surrounding ensembled buildings (actually it's a defence structure built in the 14 th century), houses exhibitions halls in two areas: Sala de Caballerizas and Salas de Palacio.