Ayutthaya, the old capital of Thailand, has long been a popular day-trip destination from Bangkok. Today, the historic city of Ayutthaya, which was designated as the UNESCO World Heritage Site in 1991, offers visitors a glimpse of the glorious but tragic history of Ayutthaya Kingdom. For those who wish to take in all the best sights that Ayutthaya has to offer in one day, the best way is taking a tour or rent a private car.