UNESCO has officially designated the pre-Columbian volcanic-ash terrace systems of Peru's Arequipa region as a World Heritage site. These sophisticated agricultural landscapes, which utilize the unique mineral properties of volcanic soil to regulate moisture and temperature, represent a pinnacle of high-altitude engineering by the Wari and subsequent Inca civilizations.
The designation highlights the traditional ecological knowledge maintained by local indigenous communities, who continue to utilize these ancient terraces for crop rotation. UNESCO's committee noted that the site provides a vital template for climate-resilient agriculture in arid mountain environments facing modern water scarcity.