If museums are on your list of things to see in Devils Lake, then you might want to head to Old Post Office Museum. If you want to experience more of the culture Devils Lake has to offer, head to Black Tiger Bay State Recreation Area, Quentin N. Burdick Sports Arena, and Ruger Park.
Though CHI St. Alexius Health Devils Lake Hospital might be what brings you to town, perhaps you'll have a chance to explore more of Devils Lake while you are here.