Separated from the Kammer by the upper reaches of the Döllbach, the Döllau, the Große Haube () on the Rhine-Weser watershed opens the Brückenau Kuppenrhön, whose western half is in Hesse and whose eastern half is in Bavaria. The valleys of the Schmaler and Breiter Sinn running southwestwards, divide the natural region, which is clearly more heterogenous than the other ranges of the Kuppen Rhön, into three segments. In the west, the rugged plateaux of dolerite and basalt transition into the Landrücken, whilst the northeast of the Kleiner Auersberg (c. ) leads up to the Dammersfeld ridge. Between the more rugged plateaux and ridges there are gently domed basalt intrusions that rise up, especially in the southeast, left of the Sinn near Bad Brückenau. The Dreistelzberg in the extreme south reasches .