2 Snake Island
The official name of this infamous island off the coast of Brazil is Ilha da Queimada Grande.
The island is thought to have a population of about 430,000 snakes. However, recent estimates are much lower. According to some estimates, there is one snake in each square meter of the island. The island is the only home of the critically endangered, venomous Bothrops insularis (golden lancehead pit viper), one of the deadliest snakes in the world.
Queimada Grande is closed to the public to protect both people and the snake population; access is only available to the Brazilian Navy and selected researchers vetted by the Chico Mendes Institute for Biodiversity Conservation, the Brazilian federal conservation unit.