Ключевые слова: balkans, bulgaria, canyon, dam, engineering, environment, europe, fishing, forest, geological, hill, hydro, hydroelectricity, lake, landmark, landscape, meander, mountain, natural, nature, panorama, pchelina, pchelina reservoir, pernik, pernik region, potsarnentsi, power, radomir, reservoir, resource, river, scenics, sight, sightseeing, struma, struma river, summer, terrain, tourism, travel, tree, view, water, wilderness,