VIDEO: Snake Island (Full Documentary)

The highest concentration of one of the most venomous snakes in the world is located about 90 miles off the coast of Santos, Brazil, on a small, craggy chunk of otherwise uninhabitable land. It's known as Ilha da Queimada Grande, or Snake Island, and it's the only place you will find 2,000 or so of the wholly unique golden lancehead viper, or Bothrops insularis.

When you step ashore, with a keen eye you spot one of these snakes roughly every 10 to 15 minutes after clearing the base of the island, and as many as one every six square yards in other parts of the island. This means, as you are walking through the waist-high brush, even with some good boots on, it's like walking through a minefield that moves and, instead of blowing you into chunks, slowly paralyzes you and liquefies your insides, as the golden lancehead does to the migrating birds it feeds on in the treetops...