this is a trick question, no curved line
No there is
Just look harder
Copy and pasting this-
For anyone curious how this works, the curves you see at first glance in your peripheral vision are created from the gray squares. Cones are the cells in your eyes that allow you to see color and they are concentrated in the center of your vision, so we can’t really see color in our peripheral vision. Our brain is just very good at guessing what color something in our peripheral vision is supposed to be, and then it fills it in for you. This particular illusion is caused by your brain guessing that the curves in the gray tiles are continuations of the green lines. So you end up seeing curvy green lines in your peripheral vision, but when you focus your eyes on the “curved” part, you can see the colors correctly and the green curves disappear
Fake news 
You can see some curved lines if you look closely at a point between the grey buildings (not the green line)
No just keep looking at the green lines 
I’m confused and why is the picture this cancer
r‎‎‎
found it
Hmm…