My highschool is surrounded by dense woods. Right next to the school we have a small lake also.

So I usually enjoy stroll when I get off my school. Yesterday as I walked down to the trail to get home, I saw something strange on a rail.

This mark. I have never seen it throughout my school life. Without further ado, this strange mark reminds me of The Slenderman symbol.

As you can see in the picture, there is a circle with crossed lines.

Actually, it's not my first time to see marks that resemble slenderman symbol, which is quite weird since most people don't know the slenderman and slenderman symbol in my country. So it's highly unlikely that someone draw the symbol to scare people.

I once saw the symbol drawn with the red paint infront of my apartment but

I forgot to take a picture. It disappeared due to rain. This time, I fortunately could take a picture. I'm uploading this asking for your opinions and advices.

What do you think about that mark appeared in my highschool? Please comment below.