Samut Prakan, also known as Pak Nam, is located 29 kilometers south of Bangkok around the area where the Chao Phraya River flows into the Gulf of Thailand. It is a town that dates back to the Ayutthaya period. Samut Prakan is home to numerous historical and cultural sites as well as such attractions as a crocodile farm, the Dinosaur Museum, Muang Boran Ancient City, and the Erawan Museum.
(http://www.tourismthailand.org/where-to-go/cities-guide/destination/samut-prakan/)