At first glance, this vintage-style illustration appears to show a familiar maritime scene. A large ocean liner moves across the water, waves fill the foreground, and a lighthouse stands along the distant coastline.
But there is a hidden detail waiting to be discovered.
The challenge asks viewers to find a dog somewhere within the illustration. The unusual part is that the animal is not presented as a separate object. Instead, its outline appears to be incorporated into the larger composition.
That makes the puzzle much harder than it initially seems.
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