Tower of Pisa

Tower of Pisa stands at 60 metres and until 1990 was leaning at about a 10 degree angle.

Although it was designed to be perfectly vertical, it started to lean during construction. Tower of Pisa is one of the most remarkable architectural structures from medieval Europe. In 1964 on Feb 27, the government of Italy ask for help to keep the Leaning tower of Pisa from toppling over. In 2008, it was estimated that the tower would be stable for another 200 years.