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71 views
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Alpine slide74 viewsYou control the speed so this is fun and fast.
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68 views
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Alpine slide in Cave City72 views
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Mammoth Cave Historic entrance79 views
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74 views
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Saltpetre (Potassium nitrate) mine67 viewsWith the help of bat dung in the cave, dirt is put in bins like this and with water the minerals are leeched out forming saltpetre which is used in gunpowder. When it is all leeched out, fresh cave dirt is put in. This where the term "petered out" comes from.
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The rotunda65 views
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63 views
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51 views
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51 views
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52 views
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