The commune of Terracina includes a considerable extent of territory towards the northwest with much undergrowth ("macchia") valuable for charcoal burning, and a considerable extent of pasture and arable land. The ancient aqueduct, bringing water some from the slopes of the Volscian Hills, has been repaired and is in use. About to the northwest, at the foot of Monte Leano, was the shrine of the nymph Feronia, where the canal following the Via Appia through the marshes ended. Along these three km of the Via Appia are numerous ancient tombs, and the fertile valley to the northeast was thickly populated in Roman days, before the intrusion of malaria.