Emily Collins, the curator of the exhibition "The Ghosts of Stations Past", introduces photos to visitors at the National Railway Museum in Adelaide, Australia, April 27, 2019. The museum is hosting an exhibition "The Ghosts of Stations Past" featuring more than 20 photos and 100 video footage that tell the history of ups and downs of rail services and remember the former railway stations scattered along with the railway network in the state. The exhibition kicked off on Saturday and continues until May 31. (Xinhua/Bai Xu)