For the more information about the air resources of the National Park Service, please visit http://www.nature.nps.gov/air/.
The largest spring in Indiana, Harrison Spring is one of the best examples of alluviated cave springs in the United States due to its location in an abandoned meander loop, and the natural levee around its periphery.
Location: Harrison County, IN
Year designated: 1980
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