THIS 200ft wide object 300ft below the Baltic, with its ‘staircase leading to a dark hole’, has baffled oceanographers since its discovery in 2012. Dubbed the “Baltic Sea Anomaly”, the structure looks like the Millenium Falcon from Star Wars. It was discovered five years ago by Swedish treasure hunters, Ocean X team, led by Peter Lindberg, its captain, and his co-researcher Dennis Asberg, The Sun reports. They used a side-scan sonar and found something strange 91 metres below the surface of the water.