I don't know if this was posted somewhere else but this is a great concept and would be a reason to take up diving. I can't imagine maintaining this place. How much fun would it be to let a shark lose in here just to mix things up a little?
http://thechive.com/2012/08/17/the-deepest-indoor-swimming-pool-in-the-world-8-hq-photos-video/
http://thechive.com/2012/08/17/the-deepest-indoor-swimming-pool-in-the-world-8-hq-photos-video/
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