Volcanoes, Roman monuments, mediaeval castles – the Mosel, Saar, and Eifel region of Germany is teeming with sights. In addition, villages and towns there house little-known cultural treasures. The “Touround” app was developed to spread the word about these gems. The app turns smartphones into an audio guide that holidaymakers can use to discover the region on eight different routes. User-friendly maps, videos, and games enhance the offer. The service is not only for travellers. The app offers companies and museums the opportunity to present their offer supra-regionally at no cost.