10. Hiriatzhohle – Schmelzwasserhohle


  • length: 112,929 m
  • location: Austria
  • year of discovery: 1949
  • place in the world: 22

9. Sistema del Gandara


  • length: 116,740 m
  • location: Cantabria, Spain
  • year of discovery: 2005
  • place in the world: 19

8. Steinbrücken Cave


  • length: 136,074 m
  • location: Austria
  • year of discovery: 1929
  • place in the world: 17

7. Ozerna


Ozerna grafika

fot. Богдан Репетило / wikipedia.org (CC BY-SA 3.0)

  • length: 140,490 m
  • location: Ternopil region, Ukraine
  • year of discovery: 1940
  • place in the world: 16

6. Sistema del Mortillano


  • length: 146,500 m
  • location: Cantabria, Spain
  • year of discovery: 1960
  • place in the world: 15

5. Schoenberg-Höhlensystem


  • length: 151,248 m
  • location: Austria
  • year of discovery: 1976
  • place in the world: 14

Ozerna. ozerna                             .


length:

ozerna                             . grafika

2022/05

  • 140,490 m location:
  • Ternopil region, Ukraine year of discovery:
  • 1940 place in the world:
  • 16

3. Sistema del Alto Tejuelo


  • length: 172,959 m
  • location: Cantabria, Spain
  • year of discovery: 1965
  • place in the world: 12

2. Hölloch


Hölloch grafika

fot. Rama / wikipedia.org (CC BY-SA 2.0 fr)

  • length: 208,000 m
  • location: Glarnine Alps, Switzerland
  • year of discovery: 1875
  • place in the world: 11

1. Optymistychna Cave


Optymistychna Cave grafika

  • length: 257,000 m
  • location: Ternopil region, Korolivka, Ukraine
  • year of discovery: 1966
  • place in the world: 6