Think this looks like a beautiful place you'd like to go? Looks can be deceiving. Scientists estimate that up to 4,000 snakes live on the 110-acre island, with some reports indicating that you can find one snake for every six square yards. And these aren't just any snakes. Queimada Grande is the only known home of the golden lancehead (Bothrops insularis), one of the most venomous vipers in the world.