The Emerald Isle 151 OPPOSITE: Killykeen Forest Park straddling Lough Oughter is situated in County Cavan, approximately five miles from Cavan town. ABOVE: Church of Saints Peter and Paul in Athlone, County Westmeath. This imposing church is often mistaken for a cathedral. Its dominant features are the twin towers on the main facade. RIGHT: A sign for the Hill of Uisneach, County Westmeath. OVERLEAF: The river Erne in County Cavan rises from the Slieve Glah mountain. It flows through Ulster and finally to the sea at Ballyshannon, County Donegal.