Cork Harbour is a natural harbour and river estuary at the mouth of the River Lee in County Cork, Ireland. It is one of several which lay claim to the title of "second largest natural harbour in the world by navigational area".

Donegal is a town at the mouth of the River Eske, in northwest Ireland. Originally built in the 15th century, Donegal Castle has later additions from the Jacobean period.

Leitrim is a village in County Leitrim, Ireland, on the River Shannon near the border with County Roscommon. It is at the junction of the R280 and R284 regional roads.

Lough Allen is a lake on the River Shannon in northeastern Connacht, Ireland. Most of the lake is in County Leitrim, with a smaller part in County Roscommon. The lake lies to the south of the River Shannon's source, near the Iron Mountains.

Lough Derg or Loch Derg is a lake in County Donegal, Republic of Ireland. It is near the border with Northern Ireland and lies about 7 kilometres north of the border village of Pettigo.

Strangford Lough is a large sea loch or inlet in County Down, in the east of Northern Ireland. It is the largest inlet in the British Isles, covering 150 km². The lough is almost totally enclosed by the Ards Peninsula and is linked to the Irish Sea.