KAO RAO CAVE
Vieng Phoukha District is surrounded by karst Limestone Mountains that have many interesting and beautiful caves. Formed by centuries of weathering that has gradually carved huge caverns out of the porous limestone, Vieng Phoukha’s caves have some of the most beautiful underground formations in northern Laos. During prehistoric times many of the caves might have been inhabited by people, but today they primarily support nesting swifts and thousands of roosting bats of over a dozen species. Some of the most accessible are the caves near Nam Eng Village (Tham Kao Rao) and the network of caverns at the base of the Phou Prasat limestone formation near Tha Luang Village.