Go for a walk along the water's edge and breathe some fresh air at Borkum Harbour. It's always nice watching the boats as they come and go.
If you're spending a while in Borkum, Borkum Harbour is a great place to start your sightseeing. This place for ships to anchor is one of numerous attractions that'll keep you occupied here. Borkum Lighthouse, Borkum Promenade, and Südstrand are also waiting to be explored nearby.