Cave of Harpea, anticlinal formed in limestone, Basque Country, Pyrenees, France

mountain summer hiking nature tourism man overview pyrenees range way cave limestone pyrenees atlantiques 64 basque country geologic stratum august sedimentary rock area temperate season seasons atmosphere leisure ecotourism tourism journey person individual shot world mountain and summit infrastructure transport geological formation earth's crust mineral matter matter substance aquitaine nouvelle aquitaine france european union europe rock mountains trippings hike hikings tripping men overviews global sight global sights full length ways path paths caves pyrenees atlantiques geologic strata sedimentary rocks