For a relatively small country, the Netherlands boasts a rich variety of nature. The largest national park is De Hoge Veluwe, which is best explored on one of its thousand free-to-use white bikes. The Wadden Sea is the largest coastal tidal wetland in Europe and on the World Heritage List. You can walk across the sea floor with a guided tour. However, the beaches of Zeeland, the hills of Limburg, the Brabant Sahara (Loonse and Drunense Dunes), Venice of the Lowlands (Weerribben-Wieden) and other nature reserves will also take your breath away.