Ключевые слова: area, arhangelsk, cave, caves, caving, district, estrada, frozen, golubino, hall, hill, ice, icicles, interest, interesting, karst, mysterious, nature, north, pinega, pinezhsky, place, rare, region, reserve, russia, russian, singing, sinister, stalactites, stalagmites, travel, underground, unique, water, winter,