So was the 'Baltic Sea UFO' an alien saucer or an underwater Nazi base? No - it 'is just rocks', claim debunkers

• Object 'is raised about 10 to 13ft above seabed and curved at the sides like a mushroom'
• Theories on origins range from downed UFO, to forgotten World War II base, or meteorite
• But experts say rock samples point to natural rock formation

Sonar scans have shown that the mysterious object could be a huge Nazi anti-submarine weapon lost beneath the waves since World War II

Since its discovery at the bottom of the Baltic Sea in May 2011, the anomaly has fascinated observers.

The apparently man-made object sits at the bottom of the ocean, looking for all intents and purposes like a drowned Millennium Falcon from the Star Wars movies.

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