Ключевые слова: alp, alpine, alps, alps mountain, alps mountains, amazing, beautiful, beauty, bern, bernese alps, blue, europe, family, gelmer, gelmerbahn, gelmersee, hidden, hike, hiking, hiking trail, hydroelectric, hydropower, lake, landscape, mountain, mountain lake, nature, outdoor, panorama, reservoir, rock, scenery, scenic, summer, swiss, switzerland, tour, tourism, tourist, trail, travel, trekking, view, water, waterpower,