Sumiyoshi Shrine is a holy site where spiritual souls gather to pray. You can do the same, or respectfully observe others in worship.
This Sumoto Onsen sacred place is a good place to begin your day of sightseeing. There's loads to do and see in the vicinity, including Awaji World Park Onokoro, Sumoto Castle, and Senkoji Temple. Wander around at your leisure at Sumiyoshi Shrine before hitting up these other fine attractions.