high alpine lakes next to the mountain hut (chamanna da grialetsch cas) in the massif of the albula alps

high alpine lakes next mountain hut chamanna grialetsch cas grialetsch-hütte sac massif albula alps zernez canton grisons switzerland kanton graubuenden schweiz amazing background beautiful blue destination eco ecology europe european flower forest grass green idyllic lake landscape meadow mountains natural nature old outdoor outdoors panorama panoramic peaceful peak picturesque rock scene scenery scenic season sky spring summer swiss travel tree trekking valley view water wild wonderful grialetsch-huette grialetsch-hutte