Sinkhole may exhibit a visible opening into a cave below. In the case of exceptionally large sinkholes, such as the Minyé sinkhole in Papua New Guinea or Cedar Sink at Mammoth Cave National Park in Kentucky, an underground stream or river may be visible across its bottom flowing from one side to the other. Sinkholes are common where the rock below the land surface is limestone or other carbonate rock, salt beds, or in other soluble rocks, such as gypsum, that can be dissolved naturally by circulating ground water. Sinkholes also occur in sandstone and quartzite terrains. As the rock dissolves,
A Countess Below Stairs A Countess Below Stairs A Countess Below Stairs is a 1981 British historical romance novel by Eva Ibbotson. It follows the story of Anna Grazinsky, a Russian countess, after World War I. It has also been published under the title The Secret Countess as a young adult novel. Anna is a charming child who sees the good in everything and everyone: her cousin Sergei, her younger brother Petya, and all of her multiple governesses. She has lived her whole life being pampered and adored by her father, fussed over by the servants, and cosseted by her mother. However, she is