Ключевые слова: activity, airlibre, birth, blue, castilla leon, circumscription, clouds, copper cave, countries, europe, exercise, firmament, forest, fuente cobre, health, hiking, hiking route, jaunt, journey, mountain palentina, nation, national park fonts carrionas, palencia, parque natural fuentes carrionas, pisuerga, river, river pisuerga, sky, spain, sport, stream, territory, tour, tourism, tree, trees, trekking, trip, vegetation, vitality, walking, water, zone,