The Eifel offers many small and large natural phenomena. In the high moors the grasses sway gently in the wind, in the Perlenbachtal near Monschau the little wild daffodils form beautiful yellow carpets of color in spring, the Eifel National Park is developing into the primeval forest of tomorrow, and at Blankenheim the juniper heath shapes the landscape. Where there was a tropical sea more than 400 million years ago, today the Eifelsteig leads over drained dolomite rocks. They are the landmark of the mineral water town of Gerolstein. It's not far from Daun to the maars, the most impressive remnants of Eifel volcanism. From a path above the Mosel, the first monumental buildings of Trier can already be seen. Two lively, historic towns - the imperial cities of Aachen and Trier - are the starting and finishing points of the Eifelsteig. In between, the long-distance hiking trail runs through the middle of the Eifel.