Optymistychna (Ukrainian: Оптимістична: meaning "optimistic", also known as Peschtschera Optimistitscheskaya) is a gypsum cave located near the Ukrainian village of Korolivka, Borshchiv Raion, Ternopil Oblast. Approximately 230 km (140 mi) of passageways have been mapped within. As a result, it is the longest cave in Eurasia and the fifth-longest cave in the world, after Mammoth Cave, Sistema Sac Actun, Jewel Cave and Sistema Ox Bel Ha. It is also the longest gypsum cave in the world.
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This 3D model of Sagarmatha National Park in Nepal was made using the PeakVisor app topographic data. The mobile app features higher precision models worldwide, more topographic details, and works offline. Download PeakVisor maps today.
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