The castle of Monleón Monument · Monleón, Guijuelo, Salamanca Image of Monleón, not of the place itself. Built in the fifteenth century over the remains of a twelfth-century fortress, it preserves a tower of five storeys and 37 metres in height restored by its owners. It is privately owned and presides over the well-kept medieval quarter of the town. Photo: Oddmeter (Public domain) What to see and do in Monleón