Arnara is a comune in the Province of Frosinone in the Italian region Lazio, located about 80 kilometres southeast of Rome and about 6 kilometr…Arnara is a comune in the Province of Frosinone in the Italian region Lazio, located about 80 kilometres southeast of Rome and about 6 kilometres southeast of Frosinone. Arnara borders the following municipalities: Ceccano, Frosinone, Pofi, Ripi, Torrice. Sights include the medieval castle.