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13 amazing sinkholes

By: Laura Moss on Oct. 6, 2010, 11:22 a.m.
Neversink Pit in Alabama

Photo: Corey Bresalier/Florida Speleological Society

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Neversink Pit

Neversink Pit is a limestone sinkhole in Alabama, and it’s one of the most-photographed sinkholes in the world because of its beautiful fern-covered ledges and waterfalls. The hole is about 40 feet wide at the top, but it expands to 100 feet at its bottom, which is 162 feet from the ground. Neversink is home to bats and several rare and endangered fern species.