Approximately 200 years in the making and about 800 years since the first block was laid the Leaning Tower of Pisa has stood as a unique architectural land mark.
Recently it has been discovered that in fact the Tower is not leaning it just looks that way due to a unique optical illusion effect of the surrounding buildings. You can see in the below image that the tower is relatively straight it is obviously the building to the right in this photo that is leaning.

And to think of all of the time and money invested over the years in trying to keep the wrong building from falling over. The city council is embarrassed and promised to immediately hire a consulting firm to study the new situation.
READ MORE - Leaning Tower of Pisa Optical Illusion