India, Sept. 3 -- What looked like a simple photograph of a riverside has turned into one of Reddit's latest puzzles. The picture was posted in the FindTheSniper community by user blacksockdown, and at first, it shows nothing special, just water moving over rocks, a rusted pipe cutting across the corner, and scattered light on the surface. But the challenge is right there in the caption: there is a snake hiding. And that single line changed how people looked at the image.

The setting does most of the trick. The rocks are a mix of grey, brown, and even green. They break up the water in ways that already confuse the eye. To many, it feels like a regular snapshot, maybe something you would take on a walk. Some users admitted they scrolled p...