the area “Sumidero". This site is located seven km from the Belisario Domínguez Bridge in Tuxtla on the edge of the river. It covers an area of 467 by 60 meters, bounded by small mounds surrounding patios. The original description of the site was undertaken in 1923 and 1932 by Becerra, who called it Chiapa Viejo, and stated it was the capital of the Chiapa people. However, Remesal in 1966 determined it was a secondary site. The last major survey was done in 1976 by Alejandro Martínez, discovering that there are 24 individual sites of which nine are mounds and fifteen are in caves. One of these contains cave paintings which indicate that the area has been occupied since at least the very early Pre Classic period. References Canyons and gorges of Mexico Tourist attractions in Chiapas Landforms of Chiapas Tourism in Mexico Natural history of Chiapas Natural history of Tabasco National parks of Mexico Protected areas of Chiapas Landforms of Tabasco Ramsar sites in Mexico Grijalva River Petén–Veracruz moist forests Central American pine–oak forests cs:Národní park Cañón del Sumidero ro:Parcul Național Cañón del Sumidero