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. Click here to view up to the first 100 of this post's 0 comments
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