The Blindensee is a small raised bog lake about 2.5 kilometres north of Schonwald village centre, protected as a nature reserve for its unusual ecology. Raised bogs form when peat moss accumulates over millennia in areas of high rainfall, eventually creating a dome of peat that sits above the surrounding land level — the name "raised bog" refers to this elevation above the water table.
The lake itself is dark with tannins from the peat and surrounded by bog vegetation including carnivorous sundews, sedges, and the distinctive bog pine. Visitor access is by boardwalk paths that traverse the bog without damaging it. The surrounding forest provides additional walking terrain, and the combination of the bog ecosystem and the forest setting is genuinely interesting for anyone with a taste for natural history.
The site is accessible on foot or by bicycle from Schonwald village centre; follow the marked trails north from the village. Dogs must be kept on leads in the nature reserve.