Honghe Hani Rice Terraces Now a UNESCO World Heritage Site Kaushik Tuesday, June 25, 2013 1 comment The Honghe Hani Rice Terraces in Southern Yunnan, China, covers an immense 16,603-hectares. These spectacular terraces cascade down the slopes of the towering Ailao Mountains to the banks of the Hong River. The terraces rise by 3,000 steps at varying angles from a shallow 15 deg..