The Eco Waterliner gives a relaxed overview of Weerribben-Wieden National Park's unique landscape, running two small craft in opposite directions between Giethoorn and Blokzijl via the park's visitor centre in Sint Jansklooster, a 1½-hour cruise between each point. Between lakes, the boats silently ply lily pad–strewn canals with abundant bird life, and you may get a glimpse of the reed harvesters at work along the banks.
You can tote along a bike for a combination tour: for example, cruising to Blokzijl, cycling back to Sint Jansklooster and continuing by boat to Giethoorn. Route cards are available for €5. Download the current boat timetable from the De Wieden Visitor Centre website.