Many people travel across the globe looking for remote and small islands that they can explore. But you'll have a hard time exploring North Sentinel Island, as you won't be able to get on it in the first place. That's because it's home to a hostile tribe that has made it their mission to stay away from the rest of human civilization. When outsiders get close, they whip out their bows and arrows.
It's not known exactly how many tribespeople live on this island, but it's estimated to be around 200. So, you won't be able to tick this island off your bucket list anytime soon.