It dates back to the 15th century. It is a watchtower of Arab construction, to defend the lands of Zalia from possible invasions from the coast. The tower is built with slate rocks forming circular roofs with lime mortar. It preserves a corbel of the machicolation that defends a doorway located at a height of about 6.5 m, with brick jambs and a single-stone lintel, hiding the half-destroyed brick vault.
It is about 9.5 metres high and according to tradition it was built in one night with materials from the surrounding area and water from the river Guaro. It served as a communication point from other watchtowers along the coast and the castle of Zalia.
This tower had its partner on the Cerro Agudo, which today is destroyed; they marked the limit of the territory of Vélez. The watchtower ceased its watchtower functions when the Christian troops took Zalia in 1485.