I believe we’ve seen similar optical illusions on this site before. However it is really awesome, if you know how to look at it! Here is what I want you to do. First cover the upper half of the picture with your palm, and you’ll automatically assume that the window corner of this building is convex (bulged out). Now try covering the lower half of the photo, and you will see the inner corner of the building (concave this time). Amazing isn’t it? Using this method you get much better experience than simply by looking at it. Some of the guys I presented this image with, couldn’t spot anything wrong before I explained them to cover half of it using their palms. I just noticed Colin made another guest post, so I’m approving it next. Enjoy! For our new visitors, please check the optical illusion widgets. You’ll be amazed what you can find there, and download it freely ;)
