Hellenthal, Italy
The Olef Dam (German: Oleftalsperre) is located in the vicinity of the Eifel National Park near Hellenthal within the High Fens-Eifel Nature Park in the county of Euskirchen in the German state of North Rhine-Westphalia. Its reservoir stores around 20 million cubic metres and is fed by the River Ole
Listen to the audio guide for Oleftalsperre Free on WIP — starts by itself when you arrive, even with the screen off