Take a Trip to Snake Island

This remote Brazilian island is home to the Golden Lancehead pit viper.
2:20 | 04/12/14

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Transcript for Take a Trip to Snake Island
Always one to take on a daring and deadly assignment, but this guy to my left wound up at what could be the most dangerous place on Earth. They call it snake island. It's off the coast of Brazil. And it's crawling with pit vibers at the center of a mystery. There it is. Looming into view. Snake island. Normally, it's illegal to visit. But we found one guy who has a permit. He is a man on a mission. So, even though we don't see snakes right now, you're saying there are snakes here? Oh, yeah. We have to find them. Reporter: Scientists estimate that almost anywhere you step foot, a gruesome death is lurking no more than three feet away. They are a formidable bees of prey, whose fast-acting venom will burn through your flesh and cause you to bleed to death. One of the riskier on-camera things I've done. If one of these things bit us, we have six hours to get off the island and to a hospital. Up to. Reporter: For centuries, the sea has put a distance between the killer snakes and the rest of us. But now, he is convinced somebody is actually stealing the snakes from the island. It's scary just filming the snakes. I want extra pay today. It's hard to imagine who would be crazy enough to steal them. Why would you steal a snake? The pet market. Reporter: People keep these at pets? Oh, yeah. Reporter: He says illegal buyers will pay up to $15,000 for a single snake. And there's another reason for the steep price tag, the venom, that is used to create valuable pharmaceuticals. Can make medicine from that. Make lots of money. Reporter: He tells us a single gram can sometimes cost more than a gram of gold on the black market, which has made him fiercely protective of this precious. If you lose the precious, you are losing the chance to save

This transcript has been automatically generated and may not be 100% accurate.

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