Great Sand Dunes National Park and Preserve is a United States National Park located in the San Luis Valley, in the easternmost parts of Alamosa County and Saguache County, Colorado, United States. Wikipedia

Rockford is the third largest city in the U.S. state of Illinois, the 160th most populous city in the United States, and the 112th most populous region in the United States. It is the county seat of Winnebago County and is located on both banks of the Rock River in far northern Illinois. Wikipedia