Carrickfergus The Essential The largest and best-preserved Norman castle in Ireland presides over this pleasant seaside town on the north shore of Belfast Lough, which has a pretty fishing port and marina. The strategic position enabled traffic in the bay to be monitored. ©AGE/PhotononstopCarrickfergus Advertising Advertising Discover the destination Carrickfergus Whitehead Discover the destination Carrickfergus: See all cities Must see Michelin's recommendations for Carrickfergus Carrickfergus Castle Carrickfergus Castle Carrickfergus 1:30 Northern gate and city walls Northern gate and city walls Carrickfergus 0:30 St Nicholas' Church St Nicholas' Church Carrickfergus 0:15