The Leaning Tower of Pisa is the bell tower of the Pisa Cathedral, and is a tourist spot that is part of the World Heritage Site "Piazza del Duomo". The tilt of the tower is said to be caused by uneven soil conditions, and it has been facing repeated crises of further tilting since 1990, when it was closed to the public for about 10 years. After renovation work, it was reopened to the public. If you climb to the top, you can look down on not only the Square of Miracles, but also the red-tiled roofs of the town.