Deep Sub Shark Adventures, Bay Islands, Honduras

The six-gill shark is one of the largest and most mysterious sharks in the ocean. They've been around since prehistoric times and can grow up to 20 feet in length. And because they live in the darkest depths of tropical oceans, few humans have encountered them. Shark Diver is the only company in the world to use research-grade mini-subs to bring tourists down 2000 feet into the Cayman Trench, where they'll see some of the planet's rarest marine life and come face to face with the steely eyes of this giant monster of the deep. It's lured to the sub's window by a tasty pig's head.

For more information: Deep Sub Shark Adventures