The Park’s landscape was to a large extent shaped by a glacier which covered this region around 12,000 years ago. The glacier, while slowly receding to the North, formed valleys, many of which are filled with water in the form of lakes. Some of the shallowest lakes have in the course of time become peat-bogs. Northern part of the park is hilly, with elevation reaching 180 meters above sea level. Southern part, on the other hand, is flat and is mainly covered with a forest, which is part of the broader Puszcza Augustowska.