The fortress of Kuelap or Cuélap (Chachapoyas, Amazonas, Perú), associated with the Chachapoyas culture, consists of massive exterior stone walls containing more than four hundred buildings. The structure, situated on a ridge overlooking the Utcubamba Valley in northern Peru, is roughly 600 meters in length and 110 meters in width. It could have been built to defend against the Huari or other hostile peoples. However, evidence of these hostile groups at the site is minimal.