With respect to Indiana, looks like we have 3 NPS properties.
George Rogers Clark National Historical Park (U.S. National Park Service)
Lincoln Boyhood National Memorial (U.S. National Park Service)
Indiana Dunes National Lakeshore (U.S. National Park Service)
George Rogers Clark National Historical Park (U.S. National Park Service)
Lincoln Boyhood National Memorial (U.S. National Park Service)
Indiana Dunes National Lakeshore (U.S. National Park Service)