black ernz river and the schiessentümpel waterfall seen from a higher perspective

background black cascade cascading clear concept course crystal ecosystem environment ernz erosion europe fall flowing forest fresh geology green higher hiking idyllic lake landscape limestone luxembourg luxemburg moss motion mountain mullerthal natural nature nobody outdoor park perspective pond reflection reserve river rocks route rural sandstone scenic schiessentümpel season seen source staircase stairs stairway stone stream tourism trail tranquil travel tuff vegetation water watercourse waterfall wilderness woods