Ohio is so diverse that it has something for every traveler. The northern side of Ohio borders onto Lake Erie, and with the great Ohio River and many other rivers flowing through the state, water recreation is abundant. The three Cs—Cincinnati, Cleveland and Columbus—are highly industrialized urban centers, while the family farms and small towns of Middle America offer a contrast to Ohio's big-city life. All over the state visitors discover amusement parks renowned for their bigger-than-life roller coasters, like Sandusky's Cedar Point in the Greater Cleveland area and Paramount's Kings Island near Cincinnati. Ohio's innumerable aviation contributions are documented and celebrated in Dayton, home of the United States Air Force Museum, one of the oldest and largest aviation museums in the world. Amish Country in north Ohio is home to the Amish and Mennonites who have shunned modern conveniences to maintain simpler times. In Appalachian Ohio, exotic animals roam free at the Wilds, a 10,000-acre endangered species reserve.