With some terrific day trip options in the surrounding area, renting a car makes sense. Without one, it wouldn’t be half as easy to explore all that Gluecksburg, 18 miles away, has to offer. Among your first few stops here should be Flensburg Harbor, Gluecksburg Castle and Solitude Beach. Don’t skip Flensburg either! Just 20 miles away, Flensburg Harbor, Gluecksburg Castle and Solitude Beach are non-negotiable stops here.