Rhein-Karte. Map by Daniel Ullrich (Threedots) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)]. Available from Wikimedia Commons.
This map shows the Rhine River (Fluss Rhein). The Vorderrhein and Hinterrhein come together in Switzerland. The Hochrhein (High Rhine) flows to the west from Lake Constance to Basel, Switzerland. The Oberrhein (Upper Rhine) flows from Basel to Bingen, Germany. This section of the Rhine flows through Switzerland, France (Alsace), and the German states of Baden-Württemburg, Rhineland-Palatinate (Rheinland-Pfalz), and Hesse. The Mittelrhein (Middle Rhine) flows from Bingen to Bonn. The Niederrhein (Lower Rhine) begins in Bonn. After it enters the Netherlands, it splits into branches, including Waal, Merwede, Nieuwe Maas, and Nederrijn, and flows out to the North Sea.
My German ancestors lived by the Rhine River. My Schneider ancestors were from Erpel and Remagen. My Nagel ancestors lived in Bonn for a while. They were originally from Hürth (Hermülheim, Kendenich), which is near the Rhine. My Gersbacher/Gerspacher ancestors were from the Hotzenwald region in Baden, in Görwihl and Niederwihl (now part of Görwihl). My Dreier ancestors were from Niederwihl. Görwihl is at the edge of the river Alb, which is a tributary of the Rhine.