Cassano all'Ionio, also named Cassano allo Ionio, is a town and comune in province of Cosenza of Calabria, southern Italy, known in Roman times as Cassanum. It lies in a fertile region in the concave recess of a steep mountain, 60 km northeast of the town of Cosenza, 10 km west of the archaeological site of Sybaris.
The rock above the city is crowned by a medieval castle commanding beautiful views. Its tower was believed to be that from which the stone was thrown that killed Milo, but that may be due to an erroneous identification of the town. There are warm sulfurous springs here, which have been used for baths.[3]
The archaeological site of Sybaris, located near the modern town of Sibari, is part of the comune of Cassano allo Ionio.