Ключевые слова: aerial, blue, borovets, bulgaria, climb, cloudscape, country, countryside, day, destination, grass, green, highest, hiking, hill, lake, landmark, landscape, moraine, mountain, musala, national, natural, nature, outdoor, outdoors, panorama, park, peak, plateau, popular, range, recreation, reflection, rila, scenery, skirt, summer, sunny, surface, top, tourism, tourist, trail, travel, trekking, trip, vacation, water, wilderness,