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10 Beautiful, Unreal Photos Of An Underwater Cave In Russia

According to legend, the "Lady of the Cave" protects divers who venture into the world's largest crystal cavern.

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1. The Ordinskaya Cave (or "Orda Cave"), which lies beneath Russia's Ural Mountains, is the world's largest gypsum crystal cave and one of the world's longest underwater caverns, with many areas still unexplored.