The Black Pockau is a left tributary of the River Flöha in the Ore Mountains. This virtually unspoilt wild stream with a length of 33 km is known for the picturesque gorge in its middle reaches.
Its murky waters flowing from bogs in the hills give the river a dark colour. The name Pockau, which was recorded in similar form in 1292, probably comes from the Czech and means "opposed", i.e. a stream flowing from Bohemia towards the north.
Wikipedia https://en.wikipedia.org/wiki/Black_Pockau
Coordinates 50°30'11.375" N 13°11'43.673" E