| 21. | As of July 2008 the cave system stands at in length.
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| 22. | It is one of the largest cave systems in the world.
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| 23. | The Peacock Springs Cave system was first explored by Vasco Murray in 1956.
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| 24. | It has several prominent cave systems at Gunung Mulu National Park.
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| 25. | There are also legends about the cave system below the mountain.
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| 26. | Hydrologically, the cave system is connected with the adjacent coastal waters.
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| 27. | Clarksville Cave is a horizontal cave system with of passage and three entrances.
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| 28. | -- Scuba diving in Mexico's Noboch Nah Chich, the largest known underwater cave system.
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| 29. | Its cave system features underground passageways and river caves filled with stalactites and stalagmites.
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| 30. | The extensive limestone cave systems are a major area for caving in the UK.
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