One of your first stops should be Portrush Tourist Information Centre. Here, you'll be able to orient yourself and pick up some great ideas before you set out exploring.
This tourist information center is situated in Portrush, a destination that has loads going for it! Giant's Causeway, Dunluce Castle, and Old Bushmills Distillery are other worthwhile attractions nearby when you've finished up at Portrush Tourist Information Centre.