Seven Hills, or Seven Mountains (German: Siebengebirge), is a Central Uplandish hill range on the east bank of the Middle Rhine, southeast of Bonn, Germany. The area, located in the municipalities of Bad Honnef and Königswinter, consists of more than 40 hills. The hills are of ancient volcanic origin and came into being between 28 and 15 million years ago. Much of the territory covered by Seven Hills belongs to the Seven Hills Nature Park (Naturpark Siebengebirge), which is under environmental protection.