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Mammoth Onyx Cave, Horse Cave

4.0
#27 of 38 in Nature in Kentucky
Cave Nature / Park
Mammoth Onyx Cave is located in Horse Cave. Plan your visit to Mammoth Onyx Cave and a wealth of other attractions, well-known and undiscovered, using our Horse Cave vacation builder.
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49 reviews
  • This is the cave located within Kentucky Down Under - it is a short 20-30 minute walk through a pretty but typical cave with nice formations and a little fun history. The guides are very good. Do not ...  more »
  • To bad it was a short tour....could have spent more time here! Great combo with the Kentucky Down Under Adventure!  more »
  • We spend the weekend touring all the caves EXCEPT Mammoth, which we had done previously. This one is so cool. It's tall and skinny, with lots of stairs. I'm relatively afraid of heights, but I had no ...  more »