Islandmagee is an ideal base for sightseeing in the Glens of Antrim and along the coast road both north and south. In the northern direction you will find Larne, Glenarm, Cushendall and Cushendull, Ballycastle with it’s Oul Lama’s Fair, the Carrick-A-Reed Rope Bridge and Ballintoy harbour as well as the Giant's Causeway, Bushmills Distillery, Whitehead, Portrush and Ballintoy Harbour. Starting early-ish you could see all this within a day.
Facing south you can visit Carrickfergus with its Norman castle; Newtownabbey, Glengormley and Jordanstown before coming to Belfast itself. In Belfast, you do not want to miss the City Hall, the castle, the Harland and Wolff shipyard where the Titanic was built; Stormont parliament buildings, Queen’s University, Botanic Gardens with the Lanyon designed Palm House, or the ‘golden mile’ leading from Shaftesbury Square to the city.
On Islandmagee itself you can go walking, swimming, cycling, horseback riding, kite flying, upsailing, rock climbing, bird watching and diving. There is a recognised PADI diving centre nearby; bookings can be made : North Irish Diving Centre