Big Spanish Castle
The image above is part of an interesting optical illusion which allow you to see black and white photo as a colored photo! Try that yourself by visiting the original site.
Staring the black dot in that image for half a minute will force our eyes to ‘memorize’ the exact image. When the image is swapped with a black & white version of the exact same image, our eyes can ‘see’ the newly swapped black & white photo as a color photo!
Try this fun stuff at the original site! Have fun~
