The Gaol River is a natural water course that originally branched off the main River Corrib and flowed through the city dividing the two islands, Altenagh and Nun’s Island. Two major mills were located approximately half way down its length. The Gaol River was incorporated in the canal system created when the Eglinton Canal was constructed in the middle of the nineteenth century.
Click on the images below from left to right to follow the course of the Gaol River from its entrance from the Eglinton Canal, along Nun’s Island, and though the City from north to south.