Ключевые слова: balkans, bulgaria, bulgarian, city, cliff, cliffs, countryside, culture, denudation, erosion, forest, geology, gorge, hiking, hill, landmark, landscape, limestone, melnik, mountain, natural, nature, panorama, peaks, phenomenon, pirin, pyramid, pyramids, sand, sandstone, scenic, sedimentary, shapes, sharp, skirt, sky, tourism, trail, travel, tropical, unique, valley, view, yellow,