Ключевые слова: abstract, beautiful, brown, calcite, cave, cavern, caving, close up, dark, detail, discovery, earth, exploration, formation, gallery, geological, geology, indoors, inside, interior, limestone, macro, mineral, mystery, natural, nature, nobody, passage, potholing, recreation, rock, scary, spain, speleology, spelunking, sport, stalactite, stalactites, stalagmite, stone, subterranean, underground, water, wet, wild,