Scientists Stunned by Mysterious Underwater Structure Found in Deepest Part of Ocean A recent discovery in the Mariana Trench, the deepest point in the world's oceans, has left experts baffled. According to a new study, a previously unknown underwater structure has been found at a staggering depth of over 36,000 feet. The enigmatic formation, which has been likened to a "mountain" due to its sheer scale, has sparked intense interest among researchers who are eager to unravel its secrets. As scientists begin to study the structure in more detail, they are shedding light on the mysteries of the ocean's deepest depths and the incredible ecosystems that thrive there.