If you like adventure and activity, check out Dunbar Cave.
With activities such as hiking, bird watching, and fishing, every outdoors lover is sure to find something to suit his or her fancy. Hiking trails range from easy to moderate, and there is a paved surface option for those less able to go through the forest. Special events are held, and you can go to their website to find out more about the specific events taking place as well as the times for them.
Dunbar Cave State Park
401 Old Dunbar Cave Road
Clarksville, Tennessee 37043
http://tnstateparks.com/parks/about/dunbar-cave
Also on their website is a park map and brochure, a detailed list of activities, and directions!