The deepest region in the world is the Challenger Deep. It is situated in a valley in the southern part of the Mariana Trench. The Mariana Trench is a 43 mile broad
Explore The Ocean's Deepest Feature: The Mariana Trench
New View of the Deepest Trench
Planet Postcard: The Mariana Trench | News | National Centers for Environmental Information (NCEI)