Siebengebirge from westside of Rhine

The Siebengebirge (lit. "seven mountains") is a German range of hills to the East of the Rhine, southeast of Bonn, consisting of more than 40 mountains and hills. It is located in the municipalities of Bad honnef and Königswinter. It is of volcanic origin and came into being between 28 and 15 million years ago. Much of the territory covered by the Siebengebirge belongs to the Naturpark Siebengebirge, which is under environmental protection.