...with one of the best-researched maars in the Eifel and yet a little-known treasure. Simply ‘fabulously’ beautiful with special insights. On a flexible walk, you will learn more about the history and experience what a maar can be. Let yourself be surprised when Holzmaar, Dürre Maar and Hetsche Maar tell their exciting stories. They have seen a lot and lived through many changes. Now the three maars are also the habitat of many endangered plants and animals.