Hie Shrine is a sacred site where religious souls gather to pray. You can do the same, or simply observe others as they worship.
If you're spending a while in Izu, Hie Shrine is a good place to kick off your sightseeing. This sacred place is one of many attractions that'll keep you on the hop here. Izu-Mito Sea Paradise, Shuzenji Temple, and Awashima Marine Park are also waiting for you close by.