forest at the scheissendempel waterfall covered with snow, mullerthal trail in waldbillig, luxembourg in winter

forest mullerthal scheissendempel snow trail winter waterfall waldbillig luxembourg frozen river bridge stone black ernz schiessentümpel consdorf echternach geology erosion hiking sandstone rock formation berdorf huel lee hohllay perekop gorges loup wolfschlucht cave landscape water luxembourgish switzerland rocks canyon swiss tree nature outdoors mountain basalt trees woodland travel tourism valley europe ardennes covered wintertime