Denny's 959 Illinois Rt 3 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM959 Illinois Rt 3 Waterloo, IL 62298 US