Discover the Lake District from its most magnificent, wildest side. The Drwęca River is the longest ichthyological nature reserve in Poland. The Marshy Valley of the Drwęca has been recognized as a bird sanctuary of European significance. In spring, hundreds of swans, wild geese, and cranes can be seen on its floodplains. The picturesque, meandering routes among the hills of the Brodnickie Lake District can last from 1.5 to 6 hours.