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