| 21. | Al Hotah Cave near Al Hamra features an underground cavern and unique underground lake system.
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| 22. | Palm Desert sits atop a vast underground lake replenished by water from the Colorado River.
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| 23. | The cave known as the " Underground Lake " is also located in this community.
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| 24. | The innermost cavern contains a crystal-clear underground lake.
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| 25. | Wafra Farms are fed by the underground lakes.
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| 26. | The lakes sometime become underground lakes or rivers.
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| 27. | We watch open-mouthed as the stage is transformed with lightning speed into the Opera House's underground lake.
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| 28. | The rest sinks into underground lakes or flows toward the Gulf of Mexico, turning rivers into sewers.
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| 29. | The cave contains the world's largest non-subglacial underground lake, The lake is located around below the surface.
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| 30. | There is an underground lake called Moqua Well in Moqua Caves in the southeast of the island.
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