4. Gulf Coast, USA
Let us introduce you another place where swimmers should not go. That’s the Gulf Coast – the most famous place where poisonous snakes can be found in abundance. The snake produces venom that kills an adult human in less than two hours. Urgent assistance is needed if the snake bites you otherwise it will all lead to death. Remember that there are plenty of water moccasins hiding in the branches above your head. These animals are great hunters and can attack you when you least expect it.