Pom Phet is a fort located on the southeast coast of the island of Ayutthaya. in Ho Rattanachai Subdistrict Phra Nakhon Si Ayutthaya District Phra Nakhon Si Ayutthaya Province in the area of Bang Kacha At the confluence of 3 rivers, the Chao Phraya River, the Pasak River, and the Lopburi River, Pom Phet is the most important of the 29 forts, of which 2 remain.