The largest deep-sea trench in the world is known as the Mariana Trench. Located in the western Pacific Ocean, it reaches a depth of approximately 10,984 meters (36,037 feet) at a point called the Challenger Deep. The trench is renowned for its extreme geological features and serves as a site of interest for scientists studying deep-sea ecosystems and the effects of pressure and darkness on marine life. The Mariana Trench exemplifies the vastness of the ocean depths and raises questions about the limits of life on Earth.