Lough Foyle, sometimes Loch Foyle (from Irish: Loch Feabhail, meaning "Lough of Feabhal"), is the estuary of the River Foyle in Ulster. It starts where the Foyle leaves Derry. It separates the Inishowen Peninsula in County Donegal, Republic of Ireland from County Londonderry in Northern Ireland.
Read more about Lough Foyle: Ramsar Site, Transport, Literature, World War II, Disputed Status