Things to make you wonder!

These illusions were found on one of these pages,

Check them all for more.

http://www.ritsumei.ac.jp/~akitaoka/cataloge.html

http://www-bcs.mit.edu/gaz/

http://www.uq.edu.au/nuq/jack/rivalry.html

http://www.ritsumei.ac.jp/~akitaoka/index-e.html

http://chat.carleton.ca/~tcstewar/illusions/index.html

 

All the lines are straight horizontal and vertical?

All the gray lines are straight horizontal and vertical?