The world is home to some of the most breathtaking islands, offering crystal-clear waters, white sands, and exotic wildlife. But hidden beneath their allure are islands that pose extreme dangers to visitors. From venomous creatures and active volcanoes to nuclear contamination and aggressive locals, these islands have earned their reputation as perilous destinations. Here are 13 of the most dangerous islands you should never underestimate.

1. Ilha da Queimada, Brazil
Also known as “Snake Island,” Queimada Grande is home to thousands of golden lancehead vipers, among the deadliest snakes in the world. Legend says there may be five snakes per square meter in certain areas. Human presence is strictly prohibited, and the Brazilian Navy patrols the island to prevent accidents. The venom of these snakes can cause rapid death, making the island extremely deadly for anyone daring to set foot on it.