sandstone rock formation, wild vegetation, trees with green foliage, wooden ladder, black ernz river

background black bridge cliff concept country countryside course creek day ecosystem environment ernz europe flowing foliage forest formation green higher hiking hill hillside ladder landscape luxembourg luxemburg mountain mullerthal natural nature nobody outdoor park path perspective plant reserve rill river road rock route rural sandstone scenic season seen staircase stairway step stone stream summer tourism trail tranquil travel tree trees valley vegetation view water watercourse wild wilderness wooden woods