Topography The topography of Indiana ranges from slightly rolling land in the northern half of the state to the rugged hills in the south. Franklin Township is the highest point above sea level at a height of 1,257 ft while the lowest point is on the Ohio River at 320 ft. An important river of Indiana is the Wabash River and its tributaries the White, Eel, Mississinewa, and Tippecanoe rivers. The northern region is drained by the Maumee River, which flows into Lake Erie at Toledo, Ohio, and by the Kankakee River, which joins the Illinois River in Illinois. In the southwest, the two White River forks empty into the Wabash, and in the southeast, the Whitewater River flows into the Ohio.

There are 400 lakes in the northern part of the state including lakes Wawasee, Maxinkuckee, Freeman, and Shafer. There are mineral springs at French Lick and West Baden in Orange County, and two large caves at Wyandotte and Marengo in adjoining Crawford County.