Hello how may I help you? Can you tell me what the deepest point on Earth is Certainly. The deepest point is the Marianna Trench What about above the water That would be the Bentley Sub-glacial Trench in Antarctica. Not the Grand Canyon? No, not the Grand Canyon. Do you mean highest? Actually wouldn't a subglacial trench be water? Let me check that for you. One moment please Who carez I do. I wish to provide you with the most accurate world record information.