That is the topic of my latest Bloomberg column, they chose an appropriate image, here is one excerpt:
Decay is another problem faced by Italy, including decay of its natural and cultural heritage. The city of Venice — a wonder of mankind and also a big money-maker as a tourist destination — is threatened by rising water levels. The Roman Coliseum is endangered by traffic fumes and exhaust. Solving those problems requires (again) extra money. As it stands, Italy has some of the worst-maintained cultural heritage in the Western world, and further decay could cut into Italy’s tourist income, producing another dangerous downward spiral.
There is much more at the link.