Did you know there's an island off the coast of Brazil called Snake Island?

It's so dangerous that Brazilian authorities don't even allow people to go to it unless there are special circumstances. The island is called Ilha da Queimada Grande, and it's home to what is thought to be one of the most dangerous and venomous snakes in the world.

There are only about 2-4 thousand of these snakes in existence, and their venom is said to literally melt human skin.

Source:

https://happyserpent.com/snake-profile/golden-lancehead-viper/