evidence: All About Lough Foyle, Northern Ireland [...] A shallow coastal embayment, Lough Foyle swells at the mouth of the River Foyle and meets the North Atlantic Ocean on the northern coast of Ireland. It receives most of its water from the Rivers Foyle, Faughan and Roe; the river inflows combined with the ocean tides impact the estuary’s salinity. Lough Foyle has a maximum depth of 50 feet and an average depth of 17 feet. Over 20 percent of its area, however, is intertidal mudflats. The 5,447-acre Lough Foyle Ramsar Site is considered a wetland of international importance and includes the mudflats, sand flats and salt marsh that ring Lough Foyle. [...] Lough Foyle is wedged between Northern Ireland and the Inishowen Peninsula in the Republic of Ireland. Also known as the "Island of Eoghain" and named for one of the sons of a high king of Ireland, Inishowen is the largest peninsula in Ireland and the country’s most northern point. It is part of the County of Donegal and has some of the most beautiful iconographic scenery in the country. Cliffs and mountains meet rock-strewn coasts surrounded by a countryside dotted with thatched cottages and the remnants of stone castles and abbeys.