The Ireland section of the website refers to the island, not the political divide, so tends to do double duty. Petition with Webmaster on here if you'd like a separate Northern Ireland section. As it stands, this one does both.
[edit: I see what you mean now. Ireland is in the title of the post. I thought you were looking at the section.
OP: Causeway Coast is in Northern Ireland, part of the UK as Paul points out]
btw, in answer to your question I loved staying in Cushendall for 10 days in December 2008. I bet you could get in to see the inside of The Curfew Tower if you were nice enough. You ask in the shop next door. [sorry edit again: The shop next door now looks very closed on Street View. Other folk around the village will know who looks after it.] They can maybe let you in, or ask the current residents. I stayed there as artist in residence with my mate. You have to find out how to do that yourself. When I stayed there it was run by Bill Drummond's organisation set up to run it, "In You We Trust". I knew friends of friends of Bill Drummond back then and I've met Susan Phillipsz, a director there, a few times. It's worth seeing inside, or chancing your arm with a bit of research if you want to stay there and make something to leave behind. Everyone who stays leaves artwork.
https://visualartists.ie/ask-for-zippy-bill-drummond-tells-the-tale-of-how-and-why-he-established-the-artists-residency-in-a-tower-on-the-antrim-coast/
Just putting it out there, rather than in direct answer to the OP's question. Cushendall is great either way though. Lovely place if you can find somewhere to stay. I apologise for multiple edits.