Pontine Marshes
plural noun
an area in W Italy, SE of Rome: formerly marshy, now drained.
British Dictionary definitions for pontine marshes
Pontine Marshes
/ (ˈpɒntaɪn) /
pl n
an area of W Italy, southeast of Rome: formerly malarial swamps, drained in 1932–34 after numerous attempts since 160 bc had failed
Italian name: Agro Pontino (ˈɑːɡro ponˈtiːno)