The Masurian Lake District is a lake district in northeastern Poland within the geographical region of Masuria. It contains more than 2,000 lakes.
The lakes are well connected by rivers and canals, forming an extensive system of waterways. The 18th-century Masurian Canal links this system to the Baltic Sea. The whole area is a prime tourist destination, frequented by boating enthusiasts, canoeists, anglers, hikers, bikers and nature-lovers. It is one of the most famous lake districts in Central Europe and a popular vacation spot, with the highest number of visitors every year.