Dating back to 1173 and even intially meant to be a perfectly vertical structure, the Tower of Pisa is today one curious attraction due to its high leaning at about 3.99 degrees. How this happened? As Wikipedia says: “The tower began to sink after construction had progressed to the third floor in 1178. This was due to a mere three-meter foundation, set in weak, unstable subsoil, a design that was flawed from the beginning.” Now, the Tower of Pisa is a beautiful landmark in a continuous fight with its harsh environmental conditions.
The well known Italian tower, although one controversial building, as you’ll see, it’s not the only one of such kind… some other towers around the world stand almost like ready to fall – some intended to be like that, some not.
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