The Largest Underwater Gypsum Cave on Earth Russia’s Orda Cave is the Largest Underwater Gypsum Cave on Earth. It's not easy to get to, but the photographs are truly awesome. Read all about it at Environmental Graffiti. Link(Image credit: Viktor Lyagushkin) Comments (0) Comments (0) Login to comment. Enable JavaScript and Click here to access all of this post's 0 comments
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