Illán de Vacas, One of Spain's Smallest Villages Curiosity · Illán de Vacas, Torrijos, Toledo Image of Illán de Vacas, not of the place itself. With barely a dozen registered inhabitants, Illán de Vacas regularly figures among the least populated municipalities in Spain. Its name combines the Latin Iulianus with the Arabic wakka. Photo: Rodelar (CC BY-SA 4.0) What to see and do in Illán de Vacas