Koraiyar Falls  Koraiyar Falls (Tamil: கோரையாரு) is one of the waterfalls along the Eastern Ghats, and near Thondamanthurai, Perambalur district, India. It's the source of many small streams which join the Vellar River. BUS ROUTE : Buses available from Perambalur to Koraiyaru.Koraiyaru is located at the foothills of Pachaimalai.One has to walk through the hills path to reach the koriyaru falls from here.