Phairi Phinat Fort was built on top of hill on the western side of the Chanthaburi River Estuary at Laem Sing, in Chanthaburi Province, about 250 south east of Bangkok.
It was built in the late 18th Century by the French as a strategic stronghold, at a time when they claimed that this part of Thailand was historically part of Cambodia, which they had colonized and claimed as their own.
Climb up the hill for its strategic importance looks over the Chanthaburi River and out to sea across the Gulf of Siam. If you scrub around you will find rock foundations of the original fort and a curious border marker perched on a rock.
Phairi Phinat Fort
Location: Bang Kachai, Laem Sing District, Chanthaburi 22120 Thailand