Naperville s a western suburb of Chicago, in Illinois. The Naper Settlement is an outdoor museum tracing the area’s history as a 19th-century pioneer outpost. Naperville Riverwalk is a network of paths and bridges that curve along the banks of the DuPage River. Nearby, Centennial Beach is a swimming complex with a water slide, diving boards and a sand volleyball court. DuPage Children’s Museum has hands-on exhibits.