Ключевые слова: abstract, background, bizarre, black, boulder, cave, cavern, clean, closeup, cold, cup, dark, darkness, deposit, design, drops, form, formations, groundwater, ice, icicle, inclined, karst, karstology, landscape, light, many, matte, natural, nature, permafrost, speleology, speleothems, stalactite, stalagmite, stalagmites, stalks, stone, subterranean, surface, texture, translucent, transparent, travel, underground, vertical, water, water resources, white, winter,