Notation on back, "This is 'Gateway to Fairyland', a scene in the vast and spectacular Endless Caverns. Perfect examples of a stalagmite and stalactite are shown in this picture. The stalagmite, with the girl's hand upon its blunt apex, extends upward from the floor; the pointed stalactite hangs from the limestone ceiling directly above. Drops of water laden with calcium carbonate, which created these stone formations through the ages, drip from the stalactite upon the stalagmite. Eventually --sometimes it requires hundreds of thousands of years -- stalactites and stalagmites join to form stone columns. Such columns, of different sizes, are shown in the left-center of the picture."