This was a major pre-Classic Maya city that seemed to have both ceremonial and trade functions. As early as A.D. 100, there were more than 200 structures here. The hieroglyphics discovered here predated those from other major Maya sites, and helped push back the first proven examples of Maya literacy. Most of the ruins remain buried, but the bases of a few pyramids and some tombs have been excavated. One of the more striking features of visiting this site is the fact that it exists in the midst of Guatemala City's major urban sprawl. Still, most of the best artifacts and carvings uncovered here are housed at the National Museum of Ethnology and Archaeology . Allow about an hour to visit this site.