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Optymistychna Cave
| Optymistychna | |
|---|---|
 | |
| Location | near Ukrainian village of Korolivka, Chortkiv Raion, Ternopil Oblast |
| Coordinates | 48°44′33″N 25°59′37″E / 48.74250°N 25.99361°E |
| Length | 230 km (140 mi)[1] |
| Discovery | 1966 |
| Geology | gypsum |
| Website | optymistychna |
Optymistychna (Ukrainian: Оптимістична: meaning "optimistic", also known as Peschtschera Optimistitscheskaya)[2][a] is a gypsum cave located near the Ukrainian village of Korolivka, Chortkiv Raion, Ternopil Oblast.[3] Approximately 264 km (164 mi)[4] of passageways have been mapped within.[1] As a result, it is the longest cave in Europe and the seventh-longest cave in the world,[5] after Mammoth Cave, Sistema Sac Actun, Jewel Cave, Shuanghedong and Sistema Ox Bel Ha. It is also the longest gypsum cave in the world.[1][6]
- ^ a b c White, William Blaine; Culver, David C. (2012). Encyclopedia of Caves. Academic Press. p. 830. ISBN 9780123838322.
- ^ Herb, Jan Conn (1977). The Jewel Cave Adventure: Fifty Miles of Discovery under South Dakota. p. 230. ISBN 0-914264-20-6.
- ^ "Optimistic cave. Speleotourism. Active and extreme tourism. Travel". www.cave-ua.narod.ru. Retrieved 28 June 2017.
- ^ Guden, Bob. "World's Longest Caves". Caver Bob. Archived from the original on 15 May 2006. Retrieved 5 November 2020.
- ^ "OPTYMISTYCHNA IS THE LONGEST CAVE IN UKRAINE - Information Portal Good News". ukrainegoodnews.com. Retrieved 28 June 2017.
- ^ Guden, Bob. "World's Longest Caves". Caver Bob. Archived from the original on 15 May 2006. Retrieved 5 November 2020.
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