Marian Shrine is a sacred site where spiritual souls gather to pray. You can do the same, or simply observe others in worship.
You'll soon find out why this Knock sacred place is a hit with travelers. If you're searching for other things to keep you busy, Knock Shrine, Basilica of Our Lady, Queen of Ireland, and Tir na nOg Fun Park are in this area too. They won't take you very long to reach from Marian Shrine.