Three Water-Filled Maars in the Eifel, Germany (IMAGE)
Caption
Three water-filled maars in the Eifel, Germany (Gemündener Maar, Weinfelder Maar, Schalkenmehrener Maar). Created by volcanic activity, maars are also found in other parts of Europe and on other continents, but Eifel-Maars are the classic example worldwide.
Credit
Martin Schildgen / Wikimedia Commons
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