River Shannon (An tSionainn)

The longest river in Ireland, flowing generally southward.

The River Shannon divides the west of Ireland (principally the province of Connacht) from the east and south (Leinster and Munster). It is named after Sionann, a river goddess.

It rises in the Cuilcagh Mountain slopes in County Cavan and flows into the Atlantic Ocean at the Shannon Estuary. The river is a major waterway, connected to Dublin by the Grand Canal and the Royal Canal. It has been a vital trade route since antiquity.