Wandlitzerin

The Nonnenfließ is a sand and clay-shaped lowland river in northeastern Brandenburg and a right-sided inflow of blackness. It is approximately eleven kilometers long and has a catchment area of approximately 89 square kilometers.
The flow of the nuns is part of the Oder catchment area via the blackness and the Finow Canal. The flow of the nuns was blocked several times by beavers.
According to a legend, there is said to have been a nunnery on the river that was torn down during a flood. The only surviving nun erected a cross in a place that is still called Eliesenkreuz or Liesenkreuz. The nun flow is said to be named after her.
wikipedia

Nature reserve:
1.the preservation and development as a habitat of wild plant communities, in particular the lean, semi-dry and dry grasslands, the fresh meadows and fresh willows, the wet meadows, the wet meadows with orchid locations, the moorland, the reed beds and sumps, the floating leaf and underwater plant communities, the Bushes of fresh and moist locations, the Segetal flora, the alder quarries, the oak hornbeam forests, the elm hillside forests, the beech forests and the natural alder ash forests;
2.to preserve the habitats of wild plant species, including species that are particularly protected in accordance with Section 10 (2) No. 10 of the Federal Nature Conservation Act, e.g. swamp calla (Calla palustris), common hornbill (Centaurium erythraea), sand-straw flower (Helichrysum arenarium), Liverwort (Hepatica nobilis), water feather (Hottonia palustris);
3. the preservation and development of the area as a habitat or retreat and potential re-expansion center for wild animal species, especially endangered or endangered amphibian and bird species (water, marsh, raptor and walking birds); Including according to § 10 Para. 2 Nos. 10 and 11 of the Federal Nature Conservation Act, particularly and strictly protected species of birds, amphibians and reptiles, for example thrush reed warbler, little swamp hen, reed swarm, red-necked grebe, black woodpecker, sparrowhawk warbler, spotted barn, comb newt, red-bellied toad, garlic toad, Tree frog, moor frog and forest lizard;
4. the development of the distant pine, spruce, birch and aspen forests into near-natural, richly structured mixed forests;
5. the preservation of the special peculiarity of a glacial landscape with its richly structured mosaic of habitats characteristic of a subglacial meltwater channel;
6. the preservation and development of the area as an essential part of the biotope network between the Werbellinsee area in the west and the Stadtsee-Rinne lying east of the area.
bravors.brandenburg.de/verordnung/nsgbuckowseerinne

Marking around the lake: yellow circle

The Rauener Berge, which are located along this hike, are end moraine hills designed by the Ice Age between the Berlin glacial valley and the Scharmützelsee, the largest lake in Brandenburg.
Deciduous forests rich in species
The Rauener stones are among the largest boulders in the Central European lowlands.

Close to town green lung

The Püttberge are elevations up to 68 meters in the east of Berlin. They are inland dunes within the Berlin glacial valley. With a relative height of more than 30 meters, they are considered the most powerful dunes in Berlin and Brandenburg.
This inland dune complex is four kilometers long and over one kilometer wide. It was created at the end of the last ice age by wind drifts. Open sand areas, dry grass communities and dry forests provide habitats for rare and endangered animal and plant species. Rarities are the Danish tragacanth, the common cat paw and the cone winter fan. However, the eye catches species like knotty and branchless grass lily or white swallowwort. The reason for the FFH report are the sandy heaths with heather and broom, dunes with open grassy meadows made of silver grass and ostrich grass as well as sub-continental blue iridescent grass. The area is home to 261 gorse and 432 butterfly species, including the highly endangered species of Great Fritillary and Swallowtail Owl.
berlin.de/senuvk/natur_gruen/naturschutz/schutzgebiete/de/nsg/nsg28.shtml

Hochuferweg
The nature reserve encompasses 1,130 hectares: coastal forest sites with interspersed peat bogs. Beech forest covers most of the nature reserve.

In the Märkische Schweiz Nature Park

The place name is often traced back to the then Mühlenbeck district councilor (also Oberamtmann) Schönwald. Other sources assume a name originating from Middle Low German, since the place was initially written Schönewalde, as can be seen on a map from 1774/75. Accordingly, the spelling Schönwalde should only have appeared in 1805.

Almost circular inflow and outflow lake.