seen a few documentaries on this place... picscrunch.blogspot.com/2010/11/beauty-inside-crystal-caves-amazing.html = crystals the size of buildings. Toxic atmosphere, 100% humidity at 200 degrees or something.
Another awesome cave I saw on TV was in South America somewhere where there was tidal slow underwater, so the water was half fresh, half salt. As the salt water is [heavier / lighter] than the fresh water, they sit in two different layers, so people swim into the caves, think the top layer is air, start breathing it and drown. nice.
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RocketSurgeon is pretending he's still young, Thu 15 Sep 2011, 13:41,
archived)
