Snake island

Mysterious deadly island in Brazil
also known as snake island

mysterious island is known as Ilha da Queimada Grande, and it is in fact so dangerous to set foot there that Brazil has made it illegal for anyone to visit. The danger on the island comes in the form of the golden lancehead snakes — a species of pit viper and one of the deadliest serpents in the world.

The lanceheads can grow to be over 1 1/2 feet long and it's estimated that there are 2,000 to 4,000 snakes on the island, which unsurprisingly is known as Snake Island. The lanceheads are so venomous that a human bitten by one could be dead within an hour.

people used to live there for a short period up to until the late 1920s, when, according to legend, the local lighthouse keeper and his family were killed by vipers that slithered in through the windows. Today, the navy periodically visits the lighthouse for upkeep and makes sure no adventurers are wandering too close to the island.

Another local legend claims that the snakes were originally introduced by pirates seeking to protect buried treasure on the island.