The main attraction is their Canal Park, which lets in huge ships into the inner harbor of Duluth for unloading and loading. This allows you to get very close to these ships in action.
This photo shows the back of my two girl’s heads as a ship comes through the canal. The Duluth harbor has been done up real nice for visitors. It is also the starting point of Minnesota’s North Shore with many cool scenic spots. Make an effort to get there sometime before the Lord returns.