While some communities might see a wall that serves as a barrier to its riverfront, Cape Girardeau, Mo., has turned its levee into a canvas for art while still providing public access to the water. Pictured is the city's Riverfront Park, which not only displays murals, but off ers a trail system and docking site for Mississippi River paddle boats. (Photo by Larry J. Summary, Cape Girardeau, Mo., via Wikimedia Commons)
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