Webum > Regional > Oceania > Northern Mariana Islands > Science and Environment See also Regional > Oceania > Science and Environment Challenger Deep Challenger Deep got its name from the British survey ship Challenger II, which pinpointed the deep water off the Marianas Islands in 1951. Also called the Marianas Trench. The Mariana Trench Explore the deepest part of the Pacific Ocean and the deepest location on Earth. UN System-Wide Earthwatch: Northern Mariana Islands Environmental information and statistics, including details for individual islands in the group. Help build the biggest human edited directory on the internet Add your website - Open Directory Project - Become an editor