The municipality lies on the watershed between the Ahr and the Moselle in the heart of the Vulkaneifel, a part of the Eifel known for its volcanic history, geographical and geological features, and even ongoing activity today, including gases that sometimes well up from the earth.
A lava flow stretching from the Ernstberg (700 m) and across the Eselsberg (637 m), ending just before the neighbouring village of Dreis, forms the bedrock under Dockweiler.