Ключевые слова: bulgaria, destination, earth pyramids, ecology, environment, formation, geological, hill, kyustendil region, landmark, landscape, limestone, mountain, natural, nature, outdoor, outdoors, panorama, panoramic, park, phenomenon, pyramids, rila, rila mountain, rock, scenic, scenics, season, sight, sightseeing, spring, stob, stob pyramids, stobski, stone, sunset, tourism, travel, tree, water, wilderness, wind, yellow,