The illusion’s name is a pun on ‘Leaning Tower,’ because it was first noticed in a pair of identical images of the Italian landmark. It also won the Best Illusion of the Year contest in 2007.

Construction on Pisa’s bell tower began in 1173, and the tower reportedly started to lean when builders reached the third story. ... Images via Depositphotos. Thank you!

Leaning Tower Of Pisa: In 1990, the tower was still tilting 5.5 degree southwards, and was closed to the public, fearing that it would crumble.

The Tower of Pisa was once feared on the brink of collapse as the lean that made it such a popular landmark threatened its very existence. As it celebrates its 850th birthday, experts now say its ...