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Our good friend Graham Hancock is currently ‘periscope down’ in writer’s terms, submerged in the first stages of writing the ‘sequel’ to his massive bestseller Fingerprints of the Gods, currently under the working title of Magicians of the Gods. As an early piece of provocation, however, he’s released the short video below showing him submerged in a different way – at strange underwater sites that some have suggested were shaped by human hands, and which were above water during the last Ice Age.

Whether they are natural or man-made, one thing is certain – these are spectacular dive sites. For those who might want to dive them one day, the locations featured in the video are: Kerama (Aka Jima), Yonaguni, Chatan and Aguni.

Natural or man-made? You decide. (Point of information. Sea level rose just over 120 metres – 400 feet – at the end of the last Ice Age. All the structures seen here would have been above water until about 12,000 years ago).

You can learn more about Graham’s work at his website, and I also suggest liking his Facebook page and/or following him on Twitter.