Rosenau
Mount Rosenau stands in the middle of the Siebengebirge between the mountains Nonnenstromberg and Ölberg. Coming on the hiking trail that goes all around Mount Ölberg (Ölbergringweg), a path leads to the Rosenau with the ruin of a small medieval castle. You will see the signpost “Aufstieg zur Rosenau”, ascent to Rosenau.