Finding old remnants of past civilizations is exciting and educating, and in Southern Illinois, there’s something you’ve got to see. This short trail leads to an abandoned prehistoric fort that was used for military action long before this area was part of Illinois or America.

It’s hard to believe that something from so long ago could still be around. Scroll on for more details about this historic site.

Located in Giant City State Park, which is part of the Shawnee National Forest, the Stone Fort Trail is a little-known path that leads to some truly intriguing ruins. It is less than half a mile in length and is a loop trail.
AllTrails/Eric Qiu
Giant City Stone Fort Site is currently an abandoned pile of rocks that used to be a stone enclosure that was built around 600-900 AD. There are actually about 10 of these old structures in the area, and they are believed to have been either former military forts or ceremonial temples.
AllTrails/Doug Neidholdt

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This prehistoric fort was constructed on a raised mass of land known as a promontory, while some others were built on hilltops. This allows for an excellent overlook that lets you see for miles across Illinois' premier forest.
AllTrails/Phil Tomlinson
Built long before any modern peoples resided here, the original wall was dismantled by European settlers, who needed the material in order to build their own structures. It was reconstructed in 1934 by the Civilian Conservation Corps but has since fallen into ruin again.
AllTrails/Phil Tomlinson
The Giant City Stone Fort Site is listed on National Register of Historic Places and can be accessed from dawn until dusk any day of the year. Don't miss the historic finds and scenic views along this rustic path.
AllTrails/Evan Lewis

For more like this, check out seven trails in Illinois that lead to some incredible pieces of history.

If you’ve ever visited this prehistoric fort, we’d love to hear from you. Please share your photos and experiences with us in comments.

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