Art fans might want to browse the collections at Gallery Kragh in Grasten. If you want to experience more of the culture Grasten has to offer, head to Grasten Palace, Graasten Slotskirke, and Egernsund Church.
If visiting museums in Sønderborg are on your list, you might want to check out the upcoming exhibitions at Rønhaves Museum. If you want to see more of the museums in Sønderborg, Dybbol Mill isn't far either.