Sunlight is shining on the Great Hall at Chicago Union Station once again! Teams completed a major restoration of the 219-foot-long skylight that is at the center of the train station and EarthCam documented the entire process. With EarthCam's 4K time-lapse movie, see progress from October 2017 to December 2018 from several unique perspectives, from inside the Great Hall to an aerial exterior view above the iconic building.