Aerial photo taken on April 22, 2019 shows a waterfall in Didonghe Tiankeng, a giant karst sinkhole at Huoshizi village of Ningqiang county in Hanzhong, Northwest China’s Shaanxi province. With a maximum depth of 340 meters, the Didonghe Tiankeng is the largest in Chanjiayan Tiankeng Group in Ningqiang county. [Photo/Xinhua]
Aerial photo taken on April 22, 2019 shows the Didonghe Tiankeng, a giant karst sinkhole at Huoshizi village of Ningqiang county in Hanzhong, Northwest China’s Shaanxi province. [Photo/Xinhua]
Photo taken on April 22, 2019 shows the crags of Didonghe Tiankeng, a giant karst sinkhole at Huoshizi village of Ningqiang county in Hanzhong, Northwest China’s Shaanxi province. [Photo/Xinhua]
Photo taken on April 22, 2019 shows a cave of Didonghe Tiankeng, a giant karst sinkhole at Huoshizi village of Ningqiang county in Hanzhong, Northwest China’s Shaanxi province. [Photo/Xinhua]
