Naachtun is an archaeological site of the pre-Columbian Maya civilization, situated at the northeastern perimeter of the Mirador Basin region in the southern Maya lowlands, now in the modern-day Department of El Petén, northern Guatemala. Naachtun was a major center of the region by the late Formative Period, and was one of the few Formative Period Mirador Basin centers which continued to flourish into the succeeding Classic period.
Situated in one of the areas most remote from contemporary settlements, the site was first rediscovered and documented in 1922 by the American archaeologist and Mayanist scholar, Sylvanus Morley. The name Naachtun was given to the site by Morley, taken from a Mayan construction glossed as "distant stones", in recognition of its remoteness.
Coordinates 17°48'1.231" N -89°49'10.272" E