I think Lake Dardanelle has the nicest visitor center in Arkansas. The lake is a 34,300-acre reservoir on the Arkansas river. The state park is actually more like two parks, with the visitor's center being located in Russellville, AR and another site in Dardanelle. Both offer camping, hiking and picnic facilities.
Jacksonport is the home of Arkansas big "Portfest" festival in June. The main emphasis of Jacksonport State Park is the White River. It was a popular port in the 1800s and that made Newport the place to be. Because of it's easy access to the water, five different generals used the town as their headquarters during the Civil War. You can tour the Jacksonport Courthouse and its War Memorial Room to find out more. There is also a restored steamboat. The views of the White River are amazing.
The best part of this park is the view from the lodge. Once called the "Castle in the Sky" this lodge give breathtaking views of the Ouachita Valley and isn't too far from the Cossatot River, a great place to float, hike and swim and it in the middle of the Ouachita forests. The park itself has camping, hiking trails and some of the most scenic panoramic views in Arkansas.
Arkansas largest lake is nestled in a pecan grove. Lake Chicot is 20-mile long oxbow lake, cut off centuries ago when the mighty Mississippi changed course. It is perfect for boating and fishing. Bird fans can also find great bird watching. The park is eight miles northeast of Lake Village on Ark. 144.
20. Logoly; McNeil
This is Arkansas's first environmental education site. Most of Logoly's 368 acres comprise a State Natural Area with unique plant life and numerous mineral springs. From U.S. 79 at McNeil, go one mile on County Road 47 (Logoly Road) to the park.