Viper Island is a beautiful island lying 4 km west from downtown Port Blair. This place is visited by number of tourists as it has multiple attractions with historical importance. The island can be approached in 20 minutes by harbor cruise originating from Rajiv Gandhi Water Sports Complex.

Years before Cellular Jail was constructed, Viper Island was the location for the first British Jail of the islands, named as the 'Viper Chain Gang Jail', built in 1867, used to imprison convicts and political prisoners. After the construction of the Cellular Jail in 1906, the Viper Jail's importance declined. Viper Island still has the ruins of a gallows atop a hillock. Today, the two-storied Jail building stands tumbled to the plinth level except for a portion of the roof with the outer wall dilapidated.

Viper Island is a serene beautiful tourist destination. The Harbor Cruise, available daily from Rajiv Gandhi Water Sports Complex, provides an overall view of different points of the harbor of this island.