How many arrows in the above optical?
 I have got a feeling this optical illusion might just blow your mind. We have put three clusters of circling balls above, but can you tell me how many of the three are going in the same direction? If you stare at the center yellow spot of the top left cluster they all seem to be going the same way, but not if you look at the other yellow spots. Let me know what you think in the comments.
You might have seen a similar illusion with our Optical Spy Owl - both modified from an unknown image. Hello guys, I've got a great old favorite illusion for you today. Take a look at the Optical Spy Archway. Someone has put a post right in front of it, but look at the top of the arch, will the two sides join at the top or not? You can click on the picture to find out. But before you click let us know what you think is going on here in the comments, we would love to hear from you. We would also love to see any of your illusions or strange photos, you can upload these to us here. We look forward to hearing from you. - Spyman  
Great table mat optical illusion makes it seem that the pattern has sunk under the weight of the tableware.
Image source: apworks 
Well actually a dark Zebra. Just stare at the center spot until the countdown finishes and then when the black shroud is lifted from the the left hand side of the picture the right hand side seems to get darker.
This advertizement for Jeep is by illustrator Jérôme Gonfond and we suggest you check out his work here.
Simple question, which way is the Optical Spy Penny Farthing cycle going, forwards or backwards?
Also check out the McGurk effect, which is another astonishing audible illusion and the Sheppard Tone illusion which is shown near the bottom of the home page.
 Salvador Dali's original Swans Reflecting Eleephants.  Our modification to Dali's original
Which of these three arcs will make the largest complete circle? Click the optical to find out.
Image credit - Ricardo Liberato
 Did Eve really make Adam eat the forbidden apple? Well this optical illusion looks like they both had a bite!
 Click or hover over picture to reveal. Image source brettstanleyphoto.com
These two cars look completely different sizes because your eyes see the 3D perspective you would normally associate with a 2D photograph. But the actual 2D size here is exactly the same. Original image source unknown.
 Hover or Click to invert This upside down illusion is of our favourite Tech Guru Walt Mossberg. If you'de like to read any of Moss's excellent work you will find it here recode.net
As an update to our grid illusion we have designed the same grid with dots. The only difference between the checker boards are the dots, the red and black squares are always the same.
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