Tourists in the lava tunnels, Reunion Island, France

geological formation lava nature tourism tourist group walk follow glove helmet indoor back shot overview indian ocean la reunion island september lava tube geological formations geologic form geologic forms lava flow lava flows tourists groups walking follow up follow ups followed gloves helmets inside indoors view from behind back view back views back sight back shots back sights overviews global sight global sights full length lava tubes lava tunnel lava tunnels earth's crust volcano ecotourism tourism journey leisure enumeration gait locomotion motion protection shot world sea and ocean france european union europe