You might want to spend some time browsing the exhibits at Gluecksburg Castle, Kobbermolle Museum, or Museumswerft Flensburg. Explore notable local landmarks like Wasserturm Flensburg-Muerwik, Duburg, and St. Nikolai Church. Dip your toes in the water at Flensburg Beach, Wassersleben Beach, and Solitude Beach.