Color the World! The Leaning Tower of Pisa

Updated on Jul 11, 2012
3.8 based on 17 ratings

The Leaning Tower of Pisa, if you can believe it, is about 750 years old! It leans because it was built on unstable soil and if it weren't for extraordinary round-the-clock measures taken to correct it, it would slowly be sinking into the earth. The Tower of Pisa is one of the most recognizable structures in the world.