Updated on MFS - Strange But True - Places 6 .
The Great Blue Hole is a large underwater sinkhole off the coast of Belize.The hole is circular in shape, over 300 metres (984 ft) across and 125 metres (410 ft) deep.It was formed as a limestone cave system during the last glacial period when sea levels were much lower. As the ocean began to rise again, the caves flooded, and the roof collapsed.
Read more about it on MFS.
Very interesting and a beautiful pic. Thanks.
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