Phraya Sri Sunthorn Voharn Monument (Noi Ajarnrayangoon), the philosopher of Thai language. He was a courtier King Rama V. He wrote many works which are considered as Thai literature.
Wat Sothon Wararam Woraviharn or Wat Hong is the oldest temple in Chachoengsao. It was built in the reign of the late Krung Sri Ayudhaya time. There Buddha in this temple is the famous, "Luang Por Sothorn". This Buddha is the symbol of Chachoengsao, and is revered by locals.
Chachoengsao Fortifications: These are located at Marupong road. They were constructed in the time of King Rama III. There are many cannons on its walls. These fortifications were built by the Siamese for fighting against the Angyee rebel.