Morgan Lewis Windmill Morgan Lewis Windmill is the biggest sugar windmill that still exists in its great condition after many centuries all throughout the Caribbean islands. The windmill was first used in the 1700’s and up to now, it is still intact. Barbados National Trust is managing Morgan Lewis Windmill and during the months of December to April, they exhibit to the tourists how the sugar windmill works. Juices that come out of the windmill as finished products are naturally sweet and really good!