"The Pit is an incredible dive site in Tulum, Mexico. A fresh water sinkhole with unlimited visibility, a hydrogen sulfide layer (aka 'the cloud'), and an 'island' of debris (with it's own tree which you can see in the picture)," says photographer Tom St George.

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Submitted July 29, 2016 at 09:55AM by trot-trot http://bit.ly/2axpDEo