Igwang 3,000-rai lote nin daga, an Fine Arts Department nagpuon sa pagpangataman nin archeological sites kan Phra Nakhon Si Ayutthaya sa irarom nin the Ayutthaya Historical Park Project kan 1982. Kan 1991, an Ayutthaya Historical Park dineklara bilang UNESCO World Heritage Site, kaiba an  Sukhothai Historical Park, Si Satchanalai Historical Park asin Kamphaeng Phet Historical Park kan United Nations Educational, Scientific and Cultural Organization (UNESCO).