Drumanagh is a very old piece of land in Ireland, right beside the ocean. Some people think that a long time ago, it was used as a big fort to keep people safe. People would build big walls around it, and they would stand on top of the wall and watch out for anyone who might try to attack.
But now, Drumanagh is just a big flat area with lots of stones. People still go there to look at the stones, and some people think it's really special because the stones might be very, very old - even older than some of the oldest castles in Ireland!
Even though we don't use Drumanagh as a fort anymore, it still reminds us of how brave and smart people were a long time ago. And who knows, maybe one day we might find out more secrets about this special place!