Tourists have been racing to Sri Thep since the ancient city in Phetchabun province was designated a Unesco World Heritage Site, but local residents have been caught off guard by the influx and services for visitors remain minimal.

Thailand’s Sri Thep Historical Park in Phetchabun may lose the chance to become a World Heritage Site if the government allows an oil company to build a drilling hole nearby, according to Wison Kosotanon, president of the Phetchabun Culture Council.