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Mammoth Cave National Park (U.S. National Park Service)
Mammoth Cave National Park
https://www.nps.gov/maca/index.htm
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Mammoth Cave Online
Mammoth Cave Online - the most complete resource for travel information
on the Mammoth Cave region of Kentucky.
http://mammothcave.com
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Mammoth Cave National Park (KY): Top Tips Before You Go - TripAdvisor
Mammoth Cave National Park, Mammoth Cave National Park: See 2,741 reviews, articles, and 1,475 photos of Mammoth Cave National Park, ranked No.1 on TripAdvisor among 11 attractions in Mammoth Cave National Park.
https://www.tripadvisor.com/Attraction_Review-g143043-d146944-Reviews-Mammoth_Cave_National_Park-Mammoth_Cave_National_Park_Kentucky.html
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Mammoth Cave National Park - Home | Facebook
Mammoth Cave National Park, Mammoth Cave, Kentucky. 25K likes. Welcome to the official Facebook page of Mammoth Cave National Park, home of the world's...
https://www.facebook.com/MammothCaveNPS
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Mammoth Cave National Park, Brownsville - KY | Roadtrippers
Mammoth Cave National Park preserves the cave system and a part of the Green River valley and hilly country of south central Kentucky. This is the world's longest known cave system, with more than 390 miles explored. Early guide Stephen Bishop called the cave a "grand, gloomy and peculiar place," but its vast chambers and complex labyrinths have earned its name—Mammoth.
https://roadtrippers.com/us/mammoth-cave-ky/nature/mammoth-cave-national-park
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Mammoth Cave National Park - 338 Photos & 165 Reviews - Parks - 1 Mammoth Cave Pkwy, Mammoth Cave, KY - Phone Number - Yelp
165 reviews of Mammoth Cave National Park "My friend and I did the 6 hour Wild Cave Tour and its was spectacular. I've never spent so many hours of my life with my face pressed against rock bottom. I've never squeezed my body through such…
https://www.yelp.com/biz/mammoth-cave-national-park-mammoth-cave
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Mammoth Cave National Park - National Geographic
Get Mammoth Cave information, facts, photos, and more in this Mammoth Cave National Park guide from National Geographic.
http://www.nationalgeographic.com/travel/national-parks/mammoth-cave-national-park/
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Mammoth Cave National Park - Wikitravel
The cave itself is approximately fifteen million years old. Humans have been visiting the cave for approximately four thousand years, although it was only discovered by Europeans in 1797. Through 1816 the cave was mined for nitrates, used in gunpowder, but after the war of 1812 ended it was sold and cave tours became popular. With nearly two hundred years as a tourist attraction Mammoth Cave is one of North America's oldest tourist destinations.
http://wikitravel.org/en/Mammoth_Cave_National_Park
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Mammoth Cave National Park - Wikipedia
Mammoth Cave National Park is a U.S. national park in central Kentucky, encompassing portions of Mammoth Cave, the longest cave system known in the world. Since the 1972 unification of Mammoth Cave with the even-longer system under Flint Ridge to the north, the official name of the system has been the Mammoth-Flint Ridge Cave System. The park was established as a national park on July 1, 1941. It became a World Heritage Site on October 27, 1981, and an international Biosphere Reserve on September 26, 1990.
https://en.wikipedia.org/wiki/Mammoth_Cave_National_Park