You would find the Mariana Trench in the western Pacific Ocean. It is renowned for being the deepest part of the world's oceans, reaching depths of about 36,000 feet (10,972 meters). The trench is located east of the Mariana Islands and represents a significant geological feature formed by the subduction of one tectonic plate beneath another. Its extreme depths create unique environments and conditions that are of great interest to scientists studying marine biology and geology.