Blue Holes Exploration Extreme Underwater Cave Diving (Exploring the Worlds Deepest Blue

2015-12-12 12

This documentary follows the charismatic Dr. Kenny Broad as he dives into blue holes-underwater caves that formed during the last ice age when sea level was .\r
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Alien Stargate the entrance to Xibalba. Watch details at . The Mysterious Belize Great Blue Hole is a large underwater hole off .