3. North Sentinel Island, India

Right off India's coast in the Bay of Bengal sits a tiny island called North Sentinel Island. With turquoise-blue waters and beautiful sandy beaches, one would think it is the perfect vacation destination, but outsiders are not allowed. The indigenous people, known as the Sentinelese, reject any contact with the outside world. 

It is one of the few places that remain untouched by the outside world. After a tsunami in 2004, the Indian Coast Guard flew over the Island to assess the damage, and they reported men emerging to shoot arrows at the helicopters. They will protect their land at all costs, so don't go near this island.