Fort Sumen is one of only two surviving fortresses that remain from the long line of them that protected the city wall of Bangkok. It is larger as it sits at the point the wall met the river to the north (upstream) of the city. After the french infantry quickly overran the fortress guarding the downstream end of the wall, the king ordered all the fortresses to be destroyed. Somehow, two of them managed to avoid being converted to rubble.
From the collection – ‘Siam 7: Echo’