Phra Nakhon Si Ayutthaya is a city located in the central plains of Thailand. It served as the capital of the Kingdom of Siam from 1350 to 1767, making it one of the most significant historical centers in Southeast Asian history.
The site is renowned for its extensive archaeological remains and ruins of ancient temples, palaces, and fortifications. Today, it is recognized as a UNESCO World Heritage site, preserved primarily as an open-air museum showcasing the architectural heritage of the Ayutthaya period.