Ключевые слова: adventure, ancient, back, below, big, black, caver, caverns, caves, chatyr dag, corridor, crimea, dark, deep, dirty, exploration, extreme, formation, geology, grotto, ground, hole, large, light, mineral, mountains, mystery, natural, nature, nobody, old, pit, rock, speleology, spelunking, stalactites, stalagmites, stone, travel, tunnel, ukraine, underground, wet,