swiss alpine forest and mountain evergreen trees above the tourist and sports mountain lake davos or davosersee, davos dorf

swiss alpine forest mountain evergreen trees tourist sports lake davos davosersee dorf canton grisons switzerland kanton graubuenden schweiz autumn beautiful beauty black blue coniferous earth day eco ecology fir flora foliage grass green isolated landscape natural nature outdoor outdoors panorama park pine plant rural scene scenic season sky spruce summer sunlight sunny top tourism travel tree vegetation view wild wilderness wood woodland woods