The Masurian Lake District or Masurian Lakeland is a lake district in northeastern Poland within the geographical region of Masuria. It contains more than 2,000 lakes. The district had been elected as one of the 28 finalists of the New7Wonders of Nature.
Masuria is famous for its lakes and forests, offering a wide range of outdoor activities from sailing to kayaking and swimming. The region includes the largest lake in Poland called Śniardwy. The resort towns include the most popular Giżycko and Mikołajki, Węgorzewo, Ryn, Pisz and Iława. Giżycko is located on the shore of Lake Niegocin. It has an ancient fortress, historic church, bridges, and passenger boats to the towns of Węgorzewo, Mikołajki and Ruciane-Nida. The town of Mikołajki is a popular tourism center. In addition to lakes, the Masurian region also has many rivers used for fly fishing, and forest areas that offer many trails for trekking and biking. There is also a variety of wildlife, edible berries and mushrooms, and large protected areas, including the Masurian Landscape Park that includes 11 nature reserves such as the Łuknajno Lake that is a UNESCO Biosphere Reserve, or the Białowieża Forest with a breeding station for European Bisons.