The deepest part of the ocean is known as the Mariana Trench, specifically the Challenger Deep, which reaches a depth of about 36,000 feet (around 11,000 meters). Located in the western Pacific Ocean, southeast of the Mariana Islands, this trench is the deepest known point on Earth. The extreme pressures and cold temperatures found at these depths create a unique environment, home to specialized organisms that can survive in such harsh conditions. The trench has been the subject of scientific exploration to understand deep-sea ecosystems and the geological processes that shape our planet.