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Jewel Caves Custer, South Dakota |
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Frank and Albert Michaud were the first people to explore the cave and it was found in 1900.They found Jewel Cave because they heard a "whoosh" sound in the cave. |
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Frank & Albert Michaud The area of the cave is 5.1537 square kilometers and it is the 3rd longest cave in the world. In 1959 they discovered ½ a mile more and by 1961 they discovered more than 15 miles. |
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Jewel Cave is located in the Black Hills of Mount Rushmore. In 1959 they discovered ½ a mile more and by 1961 they discovered more than 15 miles. |