forest with stream black ernz at the scheissendempel waterfall covered with snow, mullerthal trail in waldbillig, luxembourg

forest stream black ernz mullerthal scheissendempel snow trail winter luxembourg waterfall waldbillig frozen river bridge stone schiessentafrac14 mpel 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 valley europe ardennes covered