illusions
Sunday Morning Illusion
![](https://madartlab.com/files/2011/12/pisa.jpg)
These are two identical photographs of the Leaning Tower of Pisa but they look like they’re leaning in different directions.
The short reason is that they do not have a common vanishing point so our brain assumes that they are not parallel. The long reason can be found in this PDF by the researchers that first described the phenomenon.