The "Große Lautertal" in the middle of the UNESCO GeoPark and the Swabian Alb Biosphere reserve is the "pearl of the Swabian Alb". Several castle and ruins can be found there. The "Große Lauter" is a 37 km long river and originates in Offenhausen and flows into the Danube below Obermarchtal. On your way several small rapids and waterfalls come along and make the canoe trip to an exciting adventure. If you prefer to have a smaller and beginner trip you can also start in Oferdingen.