These vast mountains form some of the last remaining area of intact virgin rainforest in Southeast Asia .
These vast mountains harbour extensive mangrove forests , elephants , tigers , Siamese crocodiles and other rare and endangered species , and few people live in this area .
These vast mountains form some of the last remaining area of intact virgin rainforest in Southeast Asia and harbour extensive mangrove forests , elephants , tigers , Siamese crocodiles and other rare and endangered species , and few people live in this area .