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Mysterious 'ghost ship' spotted shimmering on a lake

An atmospheric video taken on Lake Superior shows a distant, strange object hovering at the water line, but it probably has a mundane explanation.

You're at Lake Superior in Michigan, one of the mighty Great Lakes stretching between the US and Canada. You look out across the water and a ghostly object appears above the gentle waves looking like it wandered out of the special effects studio for "Pirates of the Caribbean." YouTube user Jason Asselin posted a fascinating video capturing just such a sight on Monday.

What is it? The Detroit Free Press isn't making any guesses, but it does say the Great Lakes contain more than 6,000 shipwrecks. Asselin writes, "Saturday evening far off coast from Marquette, Michigan, appeared this mysterious ship that had to be gigantic! Almost as if a ghost ship was showing itself to the world...Even if it was a ship, what could be that tall in these choppy waves?" That's a lot more likely than a supernatural boat.

Is it a phantom of a tall ship? A demon haunting the waters? Never fear. YouTube comment detectives are here to help us sort this mystery out. The wavering object may actually be the Granite Island Lighthouse, which features several tall structures.

This isn't the first "ghost ship" to make an appearance this year. In June, we witnessed video of a rare mirage masquerading as a ship on the horizon. The Michigan video is no more a real ghost ship than that optical illusion, but it's still fun to let the imagination run wild.