Huapalcalco is a pre-Columbian Mesoamerican archeological site located some 5 kilometres north of Tulancingo in the state of Hidalgo, Mexico. The site was built on the west slope of the "Tecolote" hill. The slope is separated east-west by a ravine that forms two sectors at the foot of the hill and two more at the top, all of which contain archaeological vestig…Huapalcalco is a pre-Columbian Mesoamerican archeological site located some 5 kilometres north of Tulancingo in the state of Hidalgo, Mexico. The site was built on the west slope of the "Tecolote" hill. The slope is separated east-west by a ravine that forms two sectors at the foot of the hill and two more at the top, all of which contain archaeological vestiges.