#5 Snake Island, Brazil
Officially known as Ilha de Queimada Grande, the Island of Snakes is located off the coast of Sao Paulo, Brazil. Notorious for an extremely high occurrence of snakes, the island is the only place on Earth where the feared Golden Lancehead Viper lives. The snake’s venom is so powerful that it actually melts human flesh. It comes as no surprise that the Brazilian government decided to ban visitors from here.