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Leaning Tower Illusion
Category: Size and Distance | Added: November 30, 2009 | 24 comments
These two images of the Leaning Tower of Pisa are identical but if you look at them closely you'll notice that the tower on the right appears to be leaning more than the one on the left even though there is no difference between the two. This illusion won the Best Visual Illusion of the Year contest in 2007.

Leaning Tower Illusion
Image Credit: Frederick Kingdom, Ali Yoonessi and Elena Gheorghiu


Comments ( 24 )

Posted by stan on December 10, 2009
this is not true...is it? i dont think so :P
Posted by Indra on December 15, 2009
very tricky illusion..really nice one..
Posted by Steph on December 29, 2009
This is weird... I'm not sure how it works? Steph Jesus Optical Illusion
Posted by mer on February 13, 2010
they look like different colored blue backrounds, maybe it has to do with that???
Posted by William on March 1, 2010
You are comparing the edges which face each other. The left edge of the right image slopes more than the right edge of the left image.
Posted by erin on March 16, 2010
it dosent work AT all...well not to me and my friends in my class
Posted by KC on April 28, 2010
Yeah, I'm pretty sure it is real. The Scholar-pedia (peer-reviewed version of Wiki-pedia)explains it. http://www.scholarpedia.org/wiki/index.php?title=Leaning_tower_illusion&oldid=69041
Posted by bennyboo2005 on April 22, 2011
ive seen this on a phone app called blue brain its real alright
Posted by jasmin on April 30, 2011
how did he do it???????????
Posted by malleia nelix on May 7, 2011
Posted by FUnky on May 31, 2011
On is zoomed in
Posted by andrea on October 3, 2011
its the same but one looks different because it is perspective
Posted by pretty gal rock on October 9, 2011
i think they just turned the camra
Posted by Tellstar on November 3, 2011
Posted by Awesome guy on November 9, 2011
They just tilted the camera
Posted by JimL on November 13, 2011
This is a good one. There are no camera or background color tricks. The illusion is that when two (or more) identical leaning or receeding objects are placed next to each other, the object the furthest out appears to be leaning the most. When in fact they are all identical.
Posted by Shanelle on February 7, 2012
There totally right the leaning tower on the right appears to be leaning more than the leaning tower on the left.
Posted by KalaAzurehowl on March 17, 2012
ok its the exact same thing, backround diffrent colour, but if you double-cross your eyes, they are the SAME thing LOL
Posted by may on March 18, 2012
ok ok i get it
Posted by This is a massage on July 4, 2012
If you cross your eyes it's 3d.
Posted by ted on August 25, 2012
answer: There are the same
Posted by veralis on November 24, 2015
i did not need to read it i saw that the left was different than the right.
Posted by navi on August 27, 2016
its cool
Posted by Mafalda on March 25, 2017
Observe very well, the edge are a little different at the bottom for the image, yes both pics they were taken in the same place, but not in the position for the Camara. In one the Camara was straight and the other one the Camara was more vented to the front , I am not expert in these things but I was trying to find the answer. LOL

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