Ключевые слова: alpine, alps, beautiful, blue, bright, clear, cliff, climb, cloud, environment, europe, european, extreme, green, height, high, hiking, journey, landmark, landscape, lucerne, majestic, mount, mountain, nature, outdoor, peak, pilatus, range, ridge, rock, rocky, scenery, scenic, season, sky, summer, swiss, switzerland, terrain, top, tourism, tranquil, travel, trip, vacation, valley, view, wilderness,