We found this tree in Southern Illinois a few miles from the Kentucky line. Can you identify this large-leafed tree? Here's a photo of the tree and of a dried leaf.
It's possible it's a Sycamore Platanus occidentalis, but it would be easier with a close up of the bark, a farther back photo of the whole tree and especially the fruit or seeds it produces.
Sycamore would be very easy to verify or dismiss based on the fruit. Refer to the photos on this page: http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=a891
I am guessing Acer macrophyllum, Big Leaf Maple. A young maple will have this smooth bark. I have only seen maple leaves this large belonging to this species. Big Leaf Maple
Only one problem, it is usually found in the Pacific Northwest down to California. They do find this tree almost everywhere in the states.