Legendary director James Cameron is no stranger to big adventures. After all he is the man responsible for bringing such Hollywood hits as Titanic and Avatar to the silver screen. Last week Cameron announced plans for a big adventure of his own, saying he now plans to dive to the lowest point on the planet, which is found at the bottom of the Mariana Trench.

Located in the Pacific Ocean, the mysterious trench stretches 1580 miles in length and plunges nearly seven miles below the Earth's surface. Using specially designed equipment, Cameron plans to spend about six hours at the Challenger Deep, the absolute lowest point inside the trench. While there he'll collect samples for use in research in marine biology, microbiology, geology, and a host of other scientific fields.

Cameron has partnered with National Geographic and Rolex for this expedition, which he calls "DeepSea Challenge." The filmmaker plans to shoot the entire experience with 3D HD cameras for use in a future documentary on the voyage, which will be made in a submersible that has been specifically built to withstand the incredible pressures that exist inside the trench. That vehicle was built by Cameron and his team and has already been tested to a depth of five miles.

Filed under: Scuba Diving, Oceania