Crossmolina (Crois Mhaoiliona) is a small picturesque town on the River Deel, 13 km west of Ballina and less than 1.5 km from Lough Conn. The ruin of Abbeytown Abbey is 1.5 km north of Crossmolina. Further away to the east, in the grounds of Castle Gore, are the ruins of the 16th century Castle Deel. There is a heritage-centre and genealogical service at Enniscoe House, about 3 km south-east of Crossmolina. The ruins of Errew Abbey can be seen at the north end of a peninsula in Lough Conn about 10.5 km south-east of Crossmolina. John O' Hart (1824-1902), an eminent genealogist, was born in Crossmolina.