The “Sager Meere, Kleiner Sand and Heumoor” nature reserve covers around 200 hectares and is home to a wide variety of rare habitats and species. Particularly in need of protection are the heaths and sandy grasslands in the Kleiner Sand, the Sager Meere as nutrient-poor geest lakes and the raised bog areas in the Heumoor as remnants of post-glacial landscape development. The larger of the two lakes, the Große Sager Meer, is the deepest lake in the whole of Lower Saxony with a depth of over 25 meters. Today, both lakes are completely surrounded by a dense birch forest and cannot be walked on. From the Sager Meerweg trail, you can enjoy a wonderful view of the small heath landscape, which is particularly beautiful.
According to the Federal Nature Conservation Act, a nature reserve is a legally designated area in which special protection of nature and landscape is required for the conservation or restoration of ecosystems, for scientific reasons or because of their rarity, uniqueness or beauty. Actions that could lead to changes or even damage to the nature reserve are prohibited.