Deer & Langs Cave Deer Cave or Bat Cave is the largest cave passage in the world. An underground river once flowed through this area to form a stream passage cave. Langs Cave is a small cave but it has spectacular array of stalactites and stalagmites - with patterns and shapes of colors. To get to Deer & Langs Cave, one has to walk a 3 km of raised plank-walk from the Mulu National Park HQ. A bat observatory platform is located near the entrance of Bat Cave. Here you can observe the million of bats flying out in wiggling formations. Check my website for other interesting destinations: www.forestexplorers.com Thank You Forest Ang