The top five places to visit in County Leitrim Irelandâs longest river and one of the worldâs smallest romantic gestures all await you in County Leitrim. Frances Mulraney Facebook Comments County Leitrim may have the shortest length of coastline of any Irish county that touches the sea, but it still earns its right to be part of the Wild Atlantic Way. The county is recognized by its magnificent contrast between the hilly and mountainous landscape to the north of the country and the relatively flat south-east, a divide maintained by Lough Allen, which separates them. Althou...