Kibune Shrine is a sacred site where spiritual souls gather to pray. You can do the same, or respectfully observe others as they worship.
You'll soon discover why this Manazuru sacred place is a hit with travelers. If you're looking for other things to keep you busy, Atami Sun Beach, MOA Museum of Art, and Kinomiya Shrine are in this area as well. They won't take you very long to get to from Kibune Shrine.