Back كهف أوبتيميستيشنا Arabic Optimistiçeskaya mağarası Azerbaijani Оптимистическая мәмерйәһе Bashkir Аптымістычная пячора Byelorussian Optimistická jeskyně Czech Optymistytschna Petschera German Σπήλαιο Οπτιμιστίτσνα Greek Optimisma kaverno Esperanto Cueva Optymistychna Spanish Grotte Optimiste French
| 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 |
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 2017-06-28.
- ^ Guden, Bob. "World's Longest Caves". Caver Bob. Retrieved 5 November 2020.
- ^ "OPTYMISTYCHNA IS THE LONGEST CAVE IN UKRAINE - Information Portal Good News". ukrainegoodnews.com. Retrieved 2017-06-28.
- ^ Guden, Bob. "World's Longest Caves". Caver Bob. Retrieved 5 November 2020.
Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).
© MMXXIII Rich X Search. We shall prevail. All rights reserved. Rich X Search