Valley of Tehuacán-Cuicatlán listed as UNESCO heritage site

The Tehuacán-Cuicatlán Valley is now a UNESCO World Heritage Site. (AFP pic)

PARIS: The Tehuacán-Cuicatlán Valley, home to the oldest water management system in North America, was added on Monday as a “mixed site” to the UNESCO World Heritage list, reflecting its significance as both a natural and cultural area.

Straddling the Mexican states of Puebla and Oaxaca, the rugged, cactus-filled reserve that spreads across a 145,255-hectare area was first nominated to the list two years ago.

It is described by Mexico’s department for the environment as “the smallest of all the country’s arid regions” and a habitat for unique species, including the densest forests of large columnar cacti, and of examples of endangered wildlife, such as the royal eagle.”

The area, described by UNESCO as having “the richest biodiversity in all of North America” is home to 141 species of birds, including hummingbirds which are important pollinators for cacti.

It contains ten percent of the 30,000 species of vascular plants – which use vessels to distribute water and minerals through the body of the plant – in Mexico, and includes agaves, yuccas, and oaks.

Its cultural significance stems from the fact that it is home to “an exceptional water management system of canals, wells, aqueducts, and dams, the oldest in the continent, which has allowed for the emergence of agricultural settlements” in the Neolithic period, UNESCO said.

The archaeological remains from the period, when hunter-gatherers became settled farmers, also includes rock paintings, graves, mounds, and citadels.

The area has been under state protection since 1998, and in 2012 was declared a biosphere reserve.

Tehuacán, situated in Puebla, means “place of the gods” in the indigenous Nahuatl language, while Cuicatlán is in the state of Oaxaca, and its name means “the land that sings.”