Ayutthaya, Thailand. Ayutthaya is an ancient city located in central Thailand, known for its UNESCO World Heritage site featuring the ruins of the Kingdom of Ayutthaya. Explore the historical park, which showcases the remains of temples, palaces, and statues from the ancient capital. Visit Wat Phra Si Sanphet, the largest temple in the complex, and Wat Mahathat, known for its famous Buddha head entwined in tree roots. Take a boat tour along the Chao Phraya River and admire the city's skyline. Ayutthaya is a city steeped in history and spiritual significance.