Lake Vadimo (Lat. Lacus Vadimo) was a small, partially dry, lake of volcanic origin whose waters now are almost fully undergroundCf. The True Story of Lake Vadimo - also called Lake Vadimone, or in Italian: Lago Vadimone. best known as the theatre for the battles between Etruscans and Romans in 310 and 283 BC, in both of which the Romans were victorious. Background It is near the ancient Etruscan town of Horta (modern Orte) in the province of Viterbo, in the lower Tiber Valley, not far from Rome.The area was inhabited from the 6th century BC and called *Hurta: cf. Chiesa, Tarquinia: archeologia e prosopografia tra ellenismo e romanizzazione, 2006, p.267. — as testified by the findings in a necropolis nearby, now preserved in the Vatican Museums.
The Roman domination made the area a municipality of Horta (also Hortanum).John Murray, A dictionary of Greek and Roman geography, Volume 1, 1873, p.1091
According to Pliny the Younger, there were floating islands on the lake.
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