Nagapoosani Amman Temple is situated in Nainativu Island. The presiding deity is Goddess Amman. It is situated in the front side of the Nainativu Island which is one of the major Island among 11 Islands in Jaffna. This temple has long traditional and historical background. The early structure was destroyed by the Portuguese in 1620. The present structure was built during period 1720 to 1790. Currently new Raja Gopuram(Tower) in front side was built in 2015 The specialty of this temple is giving mass-feeding every day. It is traditionally believed that among the Tamil Hindus, whoever has “NagaThosam”, they should go to this temple and do the remedies against it. The annual high festival lasts for fifteen days which are held in the Month of June. In the festival time, thousands of devotees visit this temple. This festival starts from flag hoisting ceremony and ends with water cutting festival, TheCar festival is called in Tamil “Ther” which is most popular festival. Other notable feature is that when the car festival day, Goddess Nagabhoosanai is taken on the Car which has exquisite carvings depicting mythological stories on it. This temple has accommodation facilities and devotees have to reach the temple through 20 minutes voyage through ferry service.