One for boaties. The 50-minute Scheldt excursion departs from Steenplein and affords great views of the city skyline. The 2½-hour harbour cruise departs from Kaai (quay) number 14 in 't Eilandje, 1km north of the Grote Markt, daily at 14:30 from May to September and 14:30 Friday to Sunday in October.