The delta of the Po River, where it empties in the Adriatic Sea, is an excellent context for an adventurous group of travelers. The nearest city is Porto Tolle, where you’ll be able to rent kayaks or canoes that will help you see these unique marshlands from within. About 90 km (56 miles) down the coast from Venice, this is a day trip that involves a morning drive and a day of bird-watching, navigating the many, tiny islands in the delta while viewing landmarks like lighthouses and fisherman’s shacks. Due to the many landforms, this is not an adventure to be undertaken in foggy weather. For more information, consult the included site, which will give a place to rent canoes or bikes and even suggests a few itineraries.