Illinois-Indiana State Line Boundary Marker in Chicago

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An Obelisk marking the State Line between Illinois and Indiana near Lake Michigan just south of Calumet Park and beach along a small road leading to the front gate of the State Line Generating Station. [http://en.wikipedia.org/wiki/Illinois-Indiana_State_Line_Boundary_Marker]
Address: Avenue G, near 103rd St. (located on the Illinois-Indiana State Boundary Line)
Url: http://webapps.cityofchicago.org/landmarksweb/web/landmarkdetails.htm?lanId=1334&counter=159

Source wikitravel.org/en/Chicago/Far Southeast Side