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Illinois Caverns State Natural Area
Illinois Caverns is a state natural area in the New Design Precinct of Monroe County, Illinois. It features Illinois Caverns which is alternatively known as Mammoth Cave of Illinois (also Burksville Cave, Egyptian Cave, Eckert Cave). Illinois Caverns is the second-largest cave in Illinois and has more than 9.6 km of passages. The cave has a constant temperature of , and portions flood during wet weather. Passages can be high and just as wide. It is located off Illinois Route 3, south of Waterloo, near the unincorporated community of Burksville.
==History==
What is now known as Illinois Caverns hosted its first paying customers in March 1901, operated by a Mr. White of East Saint Louis. It is the only cave in Illinois to have been commercially operated, attracting many visitors from St. Louis during the 1904 World's Fair. However the cave was never considered a commercial success (it closed in 1907), and had remained almost completely unimproved, excepting the extant concrete entrance stairs and a single ladder. When the cave and environs were sold to the State of Illinois in 1985, care of the site was entrusted to Armin Krueger, until his death.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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