Historical Rum & Museum Tour with Rum Tasting. Located on the 500 acre Westerhall Estate in St. David’s on the south coast, the historic Westerhall distillery is Grenada’s premium rum producer. Further to this, Westerhall is home to the oldest working waterway in the western hemisphere. Within the distillery itself, there are still vestiges of some of the old artifacts and historical equipment that were used in the original refinery process. An ideal stop whilst on an island tour, come and see the entire rum making process.