The Ocean X Team dove down to the circle-shaped object in the Baltic Sea and met something they never experienced before. First they thought it was just stone or a rock cliff, but after further observations the object appeared more as a huge mushroom, rising 3-4 meters/10-13 feet from the seabed, with rounded sides and rugged edges. Adding to the mystery, there appears to be a pillar which is holding up the 200 foot wide object, said Lindberg. “The pillar is eight meters high,” he added."