No.1 Dangerous Island – Ilha de Queimada Grande, also referred as Snake Island, is a tiny island of 43 hectare, off the shore of Sao Paulo that is overrun with deadly snakes. The island is densely packed with 4000 highly venomous snakes. There is no perfect antidote for those victims who get infected by these venomous snakes. The snakes are latched up throughout the island, making it impossible for humans to get in. There are about five highly venomous Golden Lancehead Viper snakes on ever square feet.