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 Leap in the Dark the Void" is a film about people who are out of control made by a director who's in as close to total control as a moviemaker is ever likely to be..there's greatness in it." A Leap in the Dark A Leap in the Dark (, and also known as "Leap Into the Void") is a 1980 Italian film written and directed by Marco Bellocchio. It stars Michel Piccoli and Anouk Aimée, who won the Best Actor and Best Actress prizes respectively at the 1980 Cannes Film Festival. The film also won the David di Donatello for Best Director and was