1. darkroastedblend.com The man is sitting on a cliff, but what’s on the cliff face?

2. optical-illusion.org This looks like a Lamborghini parked next to a De Groot van, but is it?

3. This is street art done in Europe. This piece was done on a street in Germany and is called lava flows.

4. www.bloganything.net Here is a portrait of an old man, but look closely. This is also a picture of two people on a street with a dog.

5. uselessplace.com I really like this one. It is a portrait of an old man, possibly Alonso Quixano. Inside the portrait is a picture of Don Quixote De La Mancha and his squire Sancho. Don Quixote saw a windmill as a terrible beast and fought it! That is why there are also windmills in the picture.

6. z.about.com This is a picture of Leonardo doing a self portrait. But look closely, and you can see a man riding a donkey.

7. data2.blog.de Is this the face of a Native American, or is it a bundled up Inuit (Eskimo)?

8. These are paintings by M. C. Escher, our eye can follow the structure and it makes sense at a glance. Look closely though, it can’t possibly be real. The angles and heights look right, but can’t really match up. blog.miragestudio7.com cmsweb1.loudoun.k12.va.us

9. cs.unc.edu This is a well known picture by M. C. Escher. Which way is up?

10. Which of these towers is leaning more?

11. http://www.darkroastedblend.com darkroastedblend.com Move your eyes back and forth over this image.

12. darkroastedblend.com Move your eyes back and forth over this image.

13. darkroastedblend.com Move your eyes back and forth over this image.

14. Stare at black dot in centre then move head back and forth towards screen darkroastedblend.com

15. Are the purple lines straight? tacra.co.uk

16. Wikipedia.org Are these lines straight?

17. Wikipedia.org Port 1010 building in the Docklands region of Melbourne, Australia.

22. Which way is the girl spinning?