Ключевые слова: adventure, below, beneath, cave, cavern, cold, column, cracked, dark, darkness, deep, dirty, exploration, formation, geologic, geology, grotto, ground, ice, illuminated, kungur, light, mineral, mining, mysterious, mystery, natural, nature, pass, resources, risk, risky, rock, russia, scenery, shine, snow, speleology, spooky, stalactite, stalagmite, stone, subterranean, travel, tunnel, under, underground, unusual, wall, water,