For the more information about the air resources of the National Park Service, please visit http://www.nature.nps.gov/air/.
A textbook example of a cave in its middle stage of development, Marengo Cave is the most profusely decorated cave known in the Interior Lowlands biophysiographic province, with cave features of the highest quality. The cave is the location where five organisms were first identified and has had an extensive and continuous history of research and protective custody over the last century.
Location: Crawford County, IN
Year designated: 1984
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Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.
Last Updated: June 28, 2012