Mysterious Underwater Structure Discovered in the Mariana Trench A stunning underwater discovery has left scientists and explorers alike baffled. Reddit user /u/Ok-Review9023 has shared a link to a recent find in the Mariana Trench, the deepest point in the world's oceans. According to the post, a previously unknown structure has been discovered, sparking intense speculation about its origins and purpose. The Mariana Trench is a notoriously inaccessible region, making this find all the more remarkable. With the scientific community abuzz, readers can now get the latest updates on this groundbreaking discovery.