Viper Island Viper Island is a famous island known especially for its historical troves. The first jail was constructed in the premises of this island by the Britishers and the accused freedom fighters were being hanged to death on the top of the hill. In the same jail, the famous rebel Sher Ali, who was involved in the killings of the Viceroy of India in 1872 was condemned to death on the gallows. Delta Tours & Travels a tour operating company, based in Port Blair and offers tours to the Viper Island throughout the year.