
The Mississippi River corridor dominates this landscape, where the Illinois and Iowa borderlands meet through a complex network of chutes, sloughs, and islands. Keithsburg stands as the primary riverfront settlement, protected by the Keithsburg Levee Trl and characterized by a traditional grid of streets like Main St and Jefferson St. Across the water, the Port Louisa National Wildlife Refuge preserves the bottomland environment, encompassing features such as Ziegler Slough and Heaton Lake.
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