A small river mentioned in the folkloric songs as Kastritsianiko. It springs in the Panachaiko Mountain and empties into the Corinthian bay, more precisely into the Aktaio beach. It flows through Ano and Kato Kastritsi villages on the outskirts of Patras.
It is said that the ancient city of Argyra was founded in its banks and that the river had divine properties. Legend has it that the shepherd Selemnos was transformed to a river by the goddess Venus when the nymph Argyra abandoned him.In the past, it discharged itself in Rio and was called Gyftogeorgia creek. But, with the construction of the university in Rio and the Iroon Polytechniou Avenue, the flow of the river was slowed down, however, not without consequences. It tends to flood whenever precipitations are hard.