Swedish explorers have put to rest speculation of a spaceship at the bottom of the Baltic — but they’re adding fuel to the ‘what is it’ mystery of this deep-sea object anyway. Digital pictures FoxNews.com has obtained from the team show that the object, located beneath the waves of the Baltic between Sweden and Finland, is some sort of “natural, geological formation,” Peter Lindberg, the leader of the Ocean Explorer team, told FoxNews.com.

Scientists are still examining the footage from the expedition, but it appears like a giant stone, “the kind divers see in keys and harbors” — one that seems to originate from before the Ice Age, Lindberg said. The main object was not the only thing seen by the explorers. “There are other, loose stones lying around as well,” he added. “The formation of rocks is 60 meters in diameter.”