schalkenmehren, germany - 01 06 2021: caldera with schalkenmehrener maar

snow winter freezing ice frost water tree sea arctic reflection blizzard morning shore wave mountain tundra coast wind plant schalkenmehren germany 2021 schlakenmehren maar schalkenmehrener caldera lake german village daun eifel volcanic landscape hills valley volcano lakes maare one three forming dauner close sunshine schlakenmehrener covered men