The Ahr rises in Blankenheim and flows into the Rhine near Sinzig
.In Sinzig, the Ahr flows into the Rhine - in one of the last natural estuaries of a tributary. The nature reserve on the edge of Sinzig combines scenic beauty with ecological diversity: riparian zones, floodplains and river landscapes provide valuable habitats for animals and plants. The Ahr estuary is a popular destination for nature lovers and hikers who want to enjoy the tranquil, natural atmosphere and picturesque paths along the course of the river.