Alliance is a city in Box Butte County, Nebraska, United States. The population was 8,491 at the 2010 census. It is the county seat of Box Butte County.
Alliance is the home to Carhenge (a replica of Stonehenge constructed with automobiles), which is located just north of the city.
Carhenge is a replica of England's Stonehenge located near the city of Alliance, Nebraska on the High Plains. Instead of being built with large standing stones, as is the case with the original Stonehenge, Carhenge is formed from vintage American automobiles, all covered with gray spray paint. Built by Jim Reinders, it was dedicated at the June 1987 summer solstice. In 2006, a visitor center was constructed to serve the site.