Dutch Fort Dutch Fort, this is a historical site in Negombo City, the remaining gate was built in 1678. There is also a green area in front of the fortress called Esplanade. The Dutch Fortress was originally a military base, built during the Dutch colonization. There are only some ruins left, and the remaining archway says 1678, right next to the fish market. Inside the fortress, it is now a prison in Negombo.