Tenayuca (Nahuatl: tenanyōcān) is a pre-Columbian Mesoamerican archaeological site in the Valley of Mexico. In the Postclassic period of Mesoamerican chronology Tenayuca was a settlement on the former shoreline of the western arm of Lake Texcoco, located approximately 10 kilometres (6.2 mi) to the northwest of Tenochtitlan (the heart of present-day Mexico City).