Closeup View of Model of the Unisphere (Erosphere) Project on Display at Museum

A model of the Unisphere project on display at the Old Courthouse Museum in Sioux Falls, South Dakota. The concept of the project, originally called “Erosphere,” included a science center, farm of the future, visitor center, and space for scientific conventions. The Unisphere display is part of an exhibit featuring Sioux Falls projects that never came to fruition.