Built in 1783 by King Rama I to help defend against naval invasions, Phra Sumen Fort sits on the banks of a river within Santi Chai Prakan park. The white, octagonal brick-and-stucco tower is one of only two of Bangkok’s original 14 city watchtowers still standing. The fort was named after Mt. Meru (Phra Sumen in Thai) from Hindu-Buddhist mythology.
Locals and visitors alike come to the park to enjoy cool breezes, river views and even the occasional riverside aerobics class in the early evening.
The entrance to the fort itself is blocked, but it’s possible to view the structure from the outside and enjoy the surrounding park.