Braving winter's cold temps in a kayak one is rewarded by magnificent sights of Bald Eagles on Lake Dardanelle near Russellville. Speaking of eagles - Big Lake National Wildlife Refuge in northeast Arkansas was instrumental in the recovery of the bald eagle from its endangered status. We take you on an airboat and driving tour of this tucked away refuge along the Mississippi Delta. Mammoth Spring near the Missouri state line is not only the largest spring in the state, but the tenth largest in the world !