An infamous poorly-stacked column of boxed flatbread in central Italy.
The leaning tower of pizza has been there long past the "use by" dates of the comestibles contained therein, so that's the reason that it's still there --- nobody wants to eat the pizzas because they would be stale by now.
dumbass can't even pronounce pisa
"leaning tower of pizza"
"sir this isn't a dominos"