Cotzumalhuapa archaeological culture is from the piedmont area of the Escuintla Department, Guatemala. The Cotzumalhuapa archaeological zone is near the town of Santa Lucía Cotzumalguapa.The Cotzumalhuapa archaeological zone is a pre-Columbian Maya archaeological zone dating mainly to the Late Classic period in Mesoamerican chronology, although it was occupied since the Middle Preclassic period and there is evidence of a major development during the Late Preclassic period.
The famous Stela 1 from El Baúl has one of the earliest inscriptions in Mesoamerica, with the earliest legible hieroglyphic Long Count date in Guatemala equaling 37 CE.
Wikipedia https://en.wikipedia.org/wiki/Cotzumalhuapa
Address 5a Calle Calzada 15 de Septiembre, Santa Lucia Cotzumalguapa, Guatemala
Coordinates 14°19'50.973" N -91°1'21.401" E