Ключевые слова: bio reserve, czech, czech republic, drone, drones, elephant stones, elephants stones, europe, footpath, footway, forest, geological, geology, grass, green, landscape, liberec region, lusatian mountains, meadow, mountain range, mountains, natural, natural monument, nature, nature reserve, outdoor, outdoors, park, pathway, preserve, protected area, reserve, rock, rock formation, route, sandstone, sandstones, scene, scenery, scenic, stone, stones, sudety, tourist track, track, tree, trees, western sudetes, white stones,