Massive Sinkhole Documentary - World's Most Terrifying Sinkhole - Documentary HD
Published in Documentary Blog
In our documentary series, this time you can watch a new documentary called "Massive Sinkhole Documentary - World's Most Terrifying Sinkhole - Documentary HD". To watch this documentary please click the title or image above. More details and video can be found in the article. Have fun watching.
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Sinkholes may vary in size from 1 to 600 m (3.3 to 2,000 ft) both in diameter and depth, and