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Explore a remarkable piece of South Arkansas waterways history at the Ouachita River Lock & Dam No. 8, the relic of a navigation era nestled near Calion that invites both history buffs and outdoors enthusiasts. Originally completed in 1916, the lock and dam system once made the Ouachita River a thriving commercial route—and today, its legacy lives on through the adjacent recreation area with a boat ramp, tranquil river views, and riverside trails that allow visitors to connect with nature, engineering heritage, and the serene landscape of the lower Ouachita watershed. A stop here offers a blend of industrial heritage and natural escape that few other sites deliver.