The first picture is the edited one, the second is the original (the lighting in the room turns everything yellow). The snake is a viperine snake, Natrix maura. It's a viper mimic, hence the name.


Here's another (corrected) photo of the same snake.



That's what the snake looks like in reality, but like I said, the lamps in the room make everything yellow, so the colours have to be corrected.