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Illinois-Indiana Boundary Marker: A Historic Division

Explore the Illinois-Indiana Boundary Marker: A historic landmark marking the state line, dating back to 1838. A testament to early American surveying.

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The Illinois-Indiana Boundary Marker, a limestone obelisk, marks the historic border between Illinois and Indiana. Erected in 1838, it stands as a testament to the establishment of state boundaries in the early 19th century and is one of the oldest structures in the Chicago area.

A brief summary to Illinois-Indiana Boundary Marker

  • 100-500 Indianapolis Blvd, Whiting, South Side, Indiana, 46394, US

Local tips

  • Visit during the early morning or late afternoon for the best lighting for photography.
  • Take a leisurely stroll around the site to appreciate the natural beauty of the landscape.
  • Check local sources for any guided tours or historical talks that may be available.
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Getting There

  • Walking

    From Indianapolis Boulevard in Whiting, Indiana, walk north. The marker is located at the end of Avenue G, where it intersects with Indianapolis Boulevard. The walk is short, and the monument is visible from the road.

  • Public Transport

    Take the South Shore Line train to the Whiting station. From there, walk east on 119th Street, then turn north onto Indianapolis Boulevard. Continue north until you reach Avenue G. The marker will be at the end of Avenue G. Expect to pay around $20-$30 for the bus and train combined.

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Discover more about Illinois-Indiana Boundary Marker

The Illinois-Indiana Boundary Marker is a significant, yet often overlooked, historical landmark. Constructed in 1838 by the Office of the United States Surveyor General, this limestone obelisk commemorates the establishment of the boundary between Illinois and Indiana. Boundary markers like this were essential for the sale of land within new states and territories. The obelisk itself is composed of large limestone blocks, standing over 15.5 feet tall and weighing over 38,000 pounds. It replaced a simple pine post that was initially erected in 1821. The marker is situated approximately 159 miles north of the point where the border meets the Wabash River. Originally located closer to the Lake Michigan shoreline, the marker was moved in 1988 to its current location, about 191 feet north of its original site, due to landfill and industrial development. In 2021, a collaborative effort between Hammond and Chicago resulted in the creation of State Line Plaza, a small park surrounding the marker. Today, the Illinois-Indiana Boundary Marker stands as a reminder of the historical division between the two states and offers visitors a chance to reflect on the region's rich heritage.

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