Huai Kha Khaeng Wildlife Sanctuary lies in western Thailand, within a large forest landscape that reaches toward the Myanmar border. It is one of two contiguous sanctuaries—together with Thung Yai Naresuan—that form the UNESCO-listed Thungyai-Huai Kha Khaeng property. UNESCO gives the combined World Heritage area as 622,200 hectares and places it across Uthai Thani, Tak and Kanchanaburi provinces. The distinction matters: those figures refer to the joint property, not to Huai Kha Khaeng alone.
The two sanctuaries were established separately: UNESCO records Thung Yai in 1972 and Huai Kha Khaeng in 1974. The combined property entered the World Heritage List in 1991. Its protected forests include a broad range of mainland Southeast Asian formations, from dry tropical forest to evergreen and deciduous types. Thailand’s government visitor profile describes Huai Kha Khaeng as extending through Uthai Thani and Tak and notes its links to neighboring protected areas. In the landscape, ecological boundaries do not stop at the line on a visitor map.
