The famous Buddha head overgrown by tree roots at Wat Mahathat, Ayutthaya, Thailand. Ayutthaya was the capital of Siam, the former name of Thailand. Ayutthaya is still a city of its own but the old town is where the Ayutthaya Historical Park is located. The park contains the ruins of many of the old capital’s buildings, including many temple ruins and monuments. The land between the various ruins are open park land which you are free to stroll. Burma sacked the city in 1767 bringing an end to Ayutthaya as the capital. The capital moved to Thonburi for fifteen years and then to Bangkok in 1782. Thailand is the only Southeast Asian nation to never have been colonized.