Pom Phet Fortress

This fortress was never breached in war time, serving the important purpose of inspecting all foreign trade ships entering the kingdom. It now serves as a public park.

Also known as the Diamond Fortress, this 6.5 m tall and 14 m thick fortress once served as the primary line of defence of Ayutthaya Island. Out of sixteen fortifications along the city walls of Ayutthaya, this was one of the essential fortresses protecting the island from foreign ships and is one of the two remnants of old forts. After a series of renovations, the original round-shaped fortress is transformed into a hexagonal building and is now a public park.