Nakhon Ratchasima (Korat) is the largest city in northeastern Thailand and the gateway to the Isaan region, a commercial hub located 250 kilometres northeast of Bangkok. The city is close to Khao Yai National Park — a UNESCO World Heritage Site with elephants, gibbons, and hornbills — and the Khmer temple ruins of Phimai Historical Park, one of Thailand's finest examples of ancient Khmer architecture outside Cambodia.