The Broharris Canal was constructed in the 1820s when a cut – some two miles long on the south shore of Lough Foyle near Ballykelly – was made in the direction of Limavady.

It served both as a drainage channel and a navigation, with goods being brought from the Londonderry Port, and shellfish and kelp from the sandbanks along the shore.

The strategically important Belfast–Derry railway line is to be upgraded to facilitate more frequent trains and improvements to the permanent way, such as track and signalling to enable faster services.

Walkers alighting from trains arriving at Castlerock can walk to Mussenden Temple owned by the National Trust and can see the mouth of Lough Foyle and Greencastle some distance away in County Donegal.

The main character of Alfred Bester's famous science-fiction novel, The Stars My Destination, is named Gulliver Foyle.

[8] At the end of the Second World War, after the Allied victory, the remainder of the German Atlantic fleet of U-boats used to attack supply lines from North America to Britain during the Battle of the Atlantic were assembled in Lough Foyle and scuttled – as part of Operation Deadlight.