Mysteries of the Mekong
S1, E4: Laos: The Karst Caves
In central Laos, the Xiangkhouang Plateau is a landscape characterized by green mountains, rugged karst formations, and verdant valleys, with the Mekong River at its heart. It's also home to primates like red-shanked doucs, as well as more mysterious inhabitants in the region's vast underground caves--some never before seen on film.