"Hanle (also spelt Anle) is a large historic village in the Indian union territory of Ladakh. The village of Hanle comprises six hamlets - Bhok, Dhado, Punguk, Khuldo, Naga and Tibetan Refugee habitation -within 1100 sq km Changthang Wildlife Sanctuary in Changthang plateau.[1] It is the site of the 17th-century Hanle Monastery (gompa) of the Drukpa Kagyu branch of Tibetan Buddhism. Hanle is located in the Hanle River valley on an old branch of the ancient Ladakh-Tibet trade route. Hanle is the home of Hanle observatory (ISO - Indian Astronomical Observatory), the tenth (see List of highest astronomical observatories) highest optical telescope in the world in India.