Mammoth caves, the largest cavern system ever discovered in the world (the mammoths are so big), are currently 600 kilometers long and are growing. The cave was unintentionally discovered by a hunter in the 19th century.
Mammoth Cave National Park
Posted: Nov 19, 2015
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AAAA
4/5Excellent
Original Text
Mammoth Cave is the only cave-themed national park in the United States and a World Natural Heritage Site, with a variety of magical landscapes, a line of sky, crystal caves, underground dark rivers and various magical cave species.
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Posted: Nov 19, 2015
ccjccj
5/5Outstanding
Original Text
Mammoth hole is one of the largest known cave systems in the world, and two projects were selected, which is very good.
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Posted: Sep 8, 2017
哥曾经也是小鲜肉
5/5Outstanding
Original Text
I recommend everyone to go to a park, I have a lot of fun.
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Posted: Feb 21, 2018
dudu_pig
4/5Excellent
Original Text
There is a spectacular natural scenery and photography can take beautiful photos
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Posted: Nov 24, 2016
打起背包去旅行
4/5Excellent
Original Text
I have seen such attractions in China too! Generally