The Marta is an Italian river that flows into the Tyrrhenian Sea. Its source is Lake Bolsena near Marta. It flows past Tuscania and is joined by a tributary that flows from the Cimini Hills. It then flows past Tarquinia and enters the Tyrrhenian Sea near Lido di Tarquinia.
- The Times (1985), Atlas of the World: Comprehensive Edition, Times Books, Plate 79 (E4).