Already mentioned in the letter Puebla de Salas, of 1277, it is a tower with a square plan and four heights, with a crenellated finish, with sentry boxes in the corners of the roof. It is accessed through a passageway that connects it with the Valdés Salas palace, on a bridge that runs over the Camino de Santiago, and that leads to the semicircular arch that serves as an access door to the tower, in the first floor of it.