The Town Gate Monument · Monleón, Guijuelo, Salamanca Image of Monleón, not of the place itself. The main entrance of the old walled enclosure, it is a gate-tower built with granite ashlars in which four slightly pointed round arches and the tunnel that runs beneath the tower stand out. Photo: Luis Rogelio HM (CC BY-SA 2.0) What to see and do in Monleón