Tehuacán-Cuicatlán Valley: originary habitat of Mesoamerica

The Tehuacán-Cuicatlán Valley in central Mexico is recognised for its role as an originary habitat of Mesoamerica, combining important archaeological evidence for early plant domestication with exceptional semi-arid biodiversity. The property spans valley floors, canyons and surrounding ranges in Puebla and Oaxaca states.

The valley contains archaeological cave and rock-shelter sites where archaeobotanical remains attest to early local management and domestication of plants such as maize and agave. Visitors and researchers are also drawn by the region’s rich assemblage of cacti and other xerophytes that create distinctive semi-arid landscapes.

Human occupation of the valley is long-standing and archaeological research has identified sequences of plant use and cultivation dating back into the Holocene; over millennia the area became an important locus for the development of domesticated plant species central to Mesoamerican economies.

The valley lies in the intermontane region of south-central Mexico, spanning parts of Puebla and Oaxaca. The landscape is semi-arid, characterised by steep canyons and river valleys, with nearby towns providing access to the protected sites.

• Origins of agriculture: The valley is important for archaeobotanical evidence of early plant domestication in Mesoamerica, including cultivars such as maize and agave that were central to local subsistence economies.
• Biodiversity and archaeology: The region combines cultural and biological diversity, with numerous cave and rock-shelter sites and a high variety of cacti and other drought-adapted plants.

What to See #

• Coxcatlan Cave and archaeological sites: Coxcatlan Cave and other archaeological sites in the Tehuacán valley where early botanical remains have been recovered, demonstrating local processes of plant management and domestication.
• Cuicatlán basin xeric landscapes: Semi-arid slopes and canyons of the Cuicatlán basin that preserve rich cactus and xerophytic plant assemblages with high endemism, used historically for cultivation and pastoralism.