CNN's David Mattingly goes inside a massive sinkhole carved out of solid limestone by drops of water. Accompanying him is geologist Jerry Black who says there are openings in the earth like that all over Florida. The size can be deceptive, with the caverns much larger than they appear from the surface.
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
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