National Geographic - The Search for China's Blue Hole (2015)
HDTV | 1280 x 720 | .MP4/AVC @ 2356 Kbps | 43mn 57s | English AAC 160 Kbps, 2 channels | 794 MB
Genre: Documentary, Nature
A group of underwater cave enthusiasts and mountaineering organizations explore the Leye pre-history Karst in the Guangxi Zhang Autonomous Region. Never-before filmed, these underwater caves are home to species not yet discovered.