That's the Mammoth Cave in Kentucky right? being able to go 80 m underground and see all that is amazing
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Anonymous#19w
It’s really close by Mammoth Cave. That whole area has scattered caves run by local people called Crystal Onyx Cave
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Anonymous#19w
Also not too far are the Luray Caves!
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AnonymousOP9w
I also recommend checking out cave city. The cave itself isn’t as impressive as the others mentioned but the way that the city was just built on top of it is astounding + they have the world’s only underground suspension bridge 🙂↕️