Punta Perotti - Bari
Demolished in April 2006
Corviale - Rome (know as the "big snake")
Built in 1972, now dismissed
Le vele di Scampia - Naples
If you watched the tv serie "Gomorra" you should be pretty familiar with these:
Morandi's Bridge - Genoa
Built in 1963, crumbled apart yesterday, killing 39 people, 3 of those were kids
Pont du Gard
Built in 19 B.C by order of Emperor Augustus