a small alpine lake lai nair (black lake or schwarzer see) on the mountain road pass fluela (flüelapass)

small alpine lake lai nair black schwarzer swiss mountain road pass fluela flüelapass davos canton grisons switzerland kanton graubuenden schweiz alps amazing background beautiful blue destination eco ecology europe european flower forest grass green high idyllic landscape meadow mountains natural nature old outdoor outdoors panorama panoramic peaceful peak picturesque rock scene scenery scenic season sky spring summer travel tree trekking valley view water wild