What is this?

This is not a picture of a lake or body of water.
In fact there is no water in this picture.
That strip of "water" running through the picture isn't liquid at all.
Once you see it you can't unsee it.
That strip of water is made from ....
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.... cement. Its a wall, with trees on the other side of it.

i already guessed lmao

Good job!

I already don't see water and i didn't even have to look at the comment

I can see both ways. It's kind of interesting.