The leaning tower of Pisa, Toscana, Italy

The Leaning Tower of Pisa, also known simply as the Tower of Pisa, is a freestanding bell tower located in the city of Pisa, Italy. It is famous for its distinctive tilt, which is the result of an unstable foundation. The tower began to lean during its construction in the 12th century and has since become one of the most recognizable landmarks in the world.