Lithuania lies at the edge of the North European Plain. Its landscape was smoothed by the glaciers of the last ice age, and is a combination of moderate lowlands and highlands. Its highest point is Aukštojas Hill at  in the eastern part of the country. The terrain features numerous lakes (Lake Vištytis, for example) and wetlands, and a mixed forest zone covers over 33% of the country. Drūkšiai is the largest, Tauragnas is the deepest and Asveja is the longest lake in Lithuania.