evidence: Lough Foyle’s dramatic scenery featured in "Game of Thrones". After Brexit, the frontier between Northern Ireland and the Republic of Ireland will be the location for a real-life territorial conflict Look at a map of Ireland and the large triangle of Lough Foyle seems to deserve attention. It is a sandy bay with steep hills on both sides. Fishing villages hug the shore and it often teems with birds. On still summer days the water is like a mirror, but storms roll across Lough Foyle too. Some people like to blame Manannan mac Lir for these storms, a Celtic sea-god associated with the lough. Such gods can feel real when waves crash through the narrow opening from the Atlantic.