Ключевые слова: abstract, background, beautiful, beauty, blue, cave, cavern, caving, dark, europe, fatima, geologic, geology, grotto, ground, grutas, inside, interior, karst, landscape, limestone, mineral, mira de aire, mountain, natural, nature, pattern, portugal, rock, scenic, slovenia, speleology, stalactite, stalactites, stalagmite, stalagmites, stone, summer, texture, tourism, travel, underground, underwater, water, white,