Tuttlingen on the Danube Nestled in the charming Danube hills, it's an ideal place for anyone wanting to experience nature and be active. Located directly on the Danube Cycle Path, the town offers relaxed stopovers amidst green oases, sweeping views from the Honberg castle ruins and A natural phenomenon unique in Europe: the Danube Sinkhole. in the Möhringen district. Known as a world center of medical technology, Tuttlingen shows its other side here – close to nature, hospitable and full of scenic diversity.