Leaning Tower of Pisa - Credit: Wikimedia Commons
The Leaning Tower of Pisa (), or simply the Tower of Pisa (torre di Pisa ), is the campanile, or freestanding bell tower, of Pisa Cathedral. It is known for its nearly four-degree lean, the result of an unstable foundation. The tower is one of three structures in the Pisa's Cathedral Square (Piazza del Duomo), which includes the cathedral and Pisa Baptistry. Read more on Wikipedia
Source: en.wikipedia.org