Changtang National Protected Area
Gê'gyai County, China
Chang Tang National Nature Reserve lies in the northern Tibetan Plateau. It is the third-largest land nature reserve in the world, after the Northeast Greenland National Park and Kavango-Zambezi Transfrontier Conservation Area, with an area of over 334,000 km2 (129, 000 mi2), making it bigger than 183 countries. Administratively, it lies in Xainza County and Biru County of the Nagqu Prefecture. With the more recently established adjoining reserves listed below there is now a total of 496,000 km2 (191, 507 sq. miles) of connected Nature Reserves, which represents an area almost as large as Spain and bigger than 197 other countries.
NatureReserve data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).