Series on World Heritage sites, designed to help protect world culture and natural diversity, broaden our world heritage to better reflect the full spectrum of our world's culture and national treasures. Thungyai-Huai Kha Khaeng Wildlife Sanctuaries, situated adjacent to each other in a mountainous region in western Thailand, are inhabited by rare animals such as green peafowl and Indian elephants. They make up Southeast Asia's largest nature reserve where squads of forest rangers work to prevent poaching. The Galapagos Islands' unusual flora and fauna, such as giant tortoises and iguanas, are well known as the site of Darwin's observations related to his theory of evolution. They are located in the Pacific Ocean 960 kilometers to the west of Ecuador.