Most people like to travel to exotic places, especially tropical islands, which make for excellent vacation spots. But, if you want to gamble with death, you’ll avert this island at all costs. For starters, it’s also patrolled by the Indian Navy, which enforces a three-to-five-mile exclusion zone around the island. It sounds like something from Jurassic Park, which does share one real-life comparison: the inhabitants will kill you. No, it’s not dinosaurs, but native peoples who have yet to experience the Bronze Age in terms of technology. It’s no exaggeration—these island people are considered “uncontacted” and are viciously protective of...