Just in time for the month of all things spooky and supernatural comes this new video of a purported "ghost ship" sighting on Lake Superior.

YouTube user Jason Asselin posted the video on Oct. 10, which appears to show two massive vertical structures side-by-side looming above the distant horizon. The one-minute clip quickly went viral, with over 1.5 million views just three days later.

"Saturday evening far off the coast from Marquette, Michigan, appeared this mysterious ship that had to be gigantic," Asselin wrote in the video's description. "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?"

While we would love to believe this sighting is like something straight out of "Pirates of the Caribbean," the truth is that its likely nothing more than a mirage of the Granite Island Lighthouse. Built in 1869, the structure has appeared many times for residents living in Marquette as a ghostly apparition on the horizon.

Granite The Granite Island Lighthouse has often appeared as a ghostly apparition on the horizon for residents of Marquette, Michigan. (Photo: Charles W. Bash/flickr)

"Your story about the 'ghost ship' on Lake Superior is interesting, but what is being seen is not a sailboat," wrote Cyndi Sherbinowā€ˇ to ABC57. "It is the Granite Island Lighthouse and can often be seen as a mirage like form on the horizon from different points around Marquette Mi. I have witnessed it many times in my 60 years of living here."

Alas, no ghosts. No skeleton crew hunting down a rogue Captain Jack Sparrow. But a pretty cool optical illusion nonetheless.

Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.

Is that a 'ghost ship' mirage on Lake Superior?
Viral video shows what appears to be a large vessel shimmering on the horizon, but there's a logical explanation.