Little River National Wildlife Refuge protects bottomland hardwood forest, sloughs, and wetland habitat south of Broken Bow. The Duck Roost Slough Observation Deck is the easiest highlight, giving a good look into the refuge without needing a long hike.
There are also primitive walking trails for birdwatching and quiet exploration. Check conditions before going, especially during hunting season, and expect a wilder, less managed feel than Beavers Bend State Park.