West Lusatia
The north of West Lusatia is characterized by the gently undulating to almost level heather-covered moors of the natural region of Königsbrück-Ruhland Heaths , interspersed with ponds and small rivers that drain the once marshy terrain - to the west and south , especially via the Pulsnitz and its tributaries , the Haselbach and Otterbach , and in the north via the Black Elster . 
<triplet> Pulsnitz <subj> Haselbach <obj> tributary <subj> Otterbach <obj> tributary <triplet> Black Elster <subj> Pulsnitz <obj> tributary