Swedish treasure hunter Dennis Asberg believes he has uncovered something extraordinary on the Baltic seafloor. He and his Ocean X team have spent fifteen years studying a circular structure roughly sixty metres wide that sits ninety metres down. Their instruments have picked up GPS dropouts, strange electromagnetic effects and sharply defined right angles. A fresh 2025 sub-bottom scan hints that the object might not even be fixed to the seabed, which makes the whole thing feel even stranger. The team has also collected biological traces, scorched fragments and pieces of basalt from an area where that type of rock should not appear. They even logged temperatures close to zero right above the structure.
Asberg is no stranger to unusual finds. His career includes Tsarist era submarines, seventeenth century cognac and a long list of major wrecks. Even with that background, he says nothing he has encountered comes close to the oddity resting out in the Baltic.
