Turn Back Time Sioux City Public Museum Visitors travel through time and space using this innovative, steampunk-themed, interactive map of Sioux City. Interactive Hardware Custom electromechanical devices Notes Projected on a 3-D relief generated from Digital Elevation Models. Visitors travel through time and space using this innovative, steampunk-themed, interactive map of Sioux City. Interactive Hardware Custom electromechanical devices Notes Projected on a 3-D relief generated from Digital Elevation Models.