The Linggraben is a drainage ditch and a left tributary of the Dahme River in the municipality of Heidesee in the Dahme-Spreewald district. The ditch drains a lowland area located south of the village of Blossin and west of the village of Kolberg. It borders Lake Wolzig to the northeast and drains westward into Lake Langer. There is also a connection to Lake Wolzig at this point.