Located in the Aragonese region of Monegros, Lanaja is a town whose origins date back to the Neolithic. In fact, there are various sites in the area, such as Val de Lupo, Valderrey, Peñalveta, La Malena and Aldea del Correo, dating from the Copper Age to Roman times.
Among its heritage, the Church of the Assumption stands out, built on an old mosque, which in turn was built on a primitive Visigoth church. For its part, the Granero de la Diezma is a civil building from the 16th century, which until 2011 housed a museum dedicated to the Barbie doll. The ice well is another unique construction, very well preserved, with a height of more than 11 meters. The hermitage of San Sebastián, located on a mound called El Saso that dominates the town, is built on the site where the Montoro castle was formerly located, of which only the remains of a wall remain.