Two locals from Meo Vac District in the northern highlands’ Ha Giang Province take tour guide Giap Van Hai down a sheer and rugged cliff to the bottom of a 80-meter-deep sinkhole.
Source: VNExpress International,
https://e.vnexpress.net/news/places/alluring-sinkhole-in-middle-of-dong-van-rock-plateau-4522397.html
