8North Sentinel Island, India

North Sentinel Island, a small island in the Indian Ocean, is officially off-limits to all visitors. Its inhabitants, the Sentinelese, live their life completely untouched by the outside world. The Indian government forbids contact with the tribe, principally to protect them from contracting diseases they have no immunity against. 

The island’s tribespeople do not welcome visitors. American missionary John Allen Chau was killed when he illegally landed on the island in 2018. Attempts to retrieve his body have now been called off due to fears of further attacks and the risks it could post to the Sentinelese too.