[video]http://www.youtube.com/watch?v=TYQzyadWk3o[/video]
A strange object spotted during a sonar survey last year continues to baffle Swedish treasure hunters who have now dived the site.
The Ocean X Team normally look for shipwrecks in search of historic artifacts and antique wines, but decided to investigate their discovery, which some believe to be a UFO, more closely.
Located at a depth of around 85 meters (280 feet) in the Baltic Sea between Sweden and Finland, the rounded object is about 60 meters (195 feet) in diameter.
