Founded in 1350, the city of Ayuthaya – another Unesco World Heritage is located in the Chao Phraya River valley in Thailand. It sits on an island surrounded by three rivers connecting it to the Gulf of Siam. Ayutthaya presents a glimpse into the glory of ancient Thailand, where visitors can wander the haunting but romantic ruins of the former capital. After the Sukhothai period, the city was the most important in Thailand, and the old palaces and temples stand as a testament to this. There are also several foreign settlements, where you can gain a greater understanding of the influence other countries had in Thailand at the time.