Noun
a tall round marble campanile in Pisa that is not perpendicular; construction was begun in 1174
Source: WordNet(Jace) "Is there anything special you want to see? Paris? Budapest? The Leaning Tower of Pisa?" Only if it falls on Sebastian's head, she thought. Cassandra Clare
I've been to the Leaning Tower of Pisa. It's a tower, and it's leaning. You look at it, but nothing happens, so then you look for someplace to get a sandwich. Danny DeVito
Millennium Tower is infamous for its structural and foundational problems— "the city's Leaning Tower of Pisa"— which has sunk and tilted some 18 inches toward the north-west since it was opened to residents in 2009. Source: Internet