GRAPHIC: Missouri, the cave state

December 20, 2012 | 4:17 p.m. CST
Missouri is known as the Cave State because of its large number of caves. The Missouri Speleological Survey lists more than 6,300 recorded caves, a number that continues to grow each year. Caves are home to 900 unique forms of life and one of the last frontiers of exploration for adventure seekers who enjoy the underground.
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