– Mammoth Cave is a UNESCO World Heritage site<\/a> in part because it “illustrates a number of stages of the Earth’s evolutionary history and contains ongoing geological processes and unique wildlife.” It earned that distinction in 1981.<\/p>\n – Speaking of wildlife, UNESCO says “the flora and fauna of the cave is the richest caverniculous wildlife known, numbering over 130 species, of which 14 species of troglobites and troglophiles are known only to exist here.” Three endangered species live in the cave – Kentucky cave shrimp, Indiana Bat, and Gray bat.<\/p>\n – Native Americans discovered Mammoth Cave around 4,000 years ago and used it for 2,000 years.<\/p>\n – Settlers of European origin found it in the late 1790’s, and tours began in 1816, making it one of the nation’s oldest tourist attractions.<\/p>\n – Mammoth Cave was privately owned for more than century. In 1926, Congress authorized the formation of a national park in the area but Mammoth Cave National Park<\/a> was not officially established in 1941.<\/p>\n – The Cave Research Foundation has mapped more than 390 miles of Mammoth Cave, but nobody knows exactly how much cave is down there. There are 14 miles of developed cave trails.<\/p>\n – The \u00a0temperature in the cave typically stays in the 50s, ranging from between 54 and 60 degrees Fahrenheit. Temperatures at the entrances, however, vary a bit more depending on the season.<\/p>\n – Each year, around 650,000 people visit the park and 400,000 of them go on a cave tour.<\/p>\n – The Drapery Room is a part of the cave made up of limestone walls covered in dripstone that looks like swaths of fabric, hence the name.<\/p>\n – Water combined with carbon dioxide from either the air or soil to form carbonic acid in the cave, and that acid dissolved the limestone, forming the cave.<\/p>\n – The roof of the cave is made of shale and sandstone. Unlike limestone, it does not dissolve easily and keeps the cave dry.<\/p>\n – You can see sea fossils of sea creatures in the walls of the cave.<\/p>\n – Stalactites hang down from the ceiling of the cave (you can remember that stalactites hold tight to the ceiling) and often begin as soda straws, which are thing and hollow.<\/p>\n![\"Fun](\"http:\/\/betweenusparents.com\/wp-content\/uploads\/2017\/05\/Fun-Facts-about-Mammoth-Cave-576x1024.jpg\")
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