The watchtowers of the Escalote valley Curiosity · Caltojar, Berlanga, Soria Image of Caltojar, not of the place itself. Three tenth-century Muslim watchtowers are spread across the municipal district and communicated with each other and with Gormaz, forming part of the alert network that covered the whole Duero frontier. Photo: Rowanwindwhistler (CC BY-SA 3.0) What to see and do in Caltojar