North Sentinel Island

This island is home to the Sentinelese, an isolated tribe of around 400 people, known for chasing away and sometimes killing visitors. In the past, explorers have claimed that the islands here (Andaman islands) featured cannibals – sailors were advised to stay clear of them. In short, stay away. I believe it is also illegal to go ashore. The Sentinelese have refused attempts to establish relationships from the outside. For example, between the 1960-90s the Indian government had such a program that failed.