The Holiday Train leaves the Addison station on the Blue Line in Chicago, the United States, Dec. 18, 2021. The year of 2021 marks the 30th anniversary for the Holiday Train service by Chicago Transit Authority. (Photo by Joel Lerner/Xinhua)
People pose for a photo in the Holiday Train on the Blue Line in Chicago, the United States, Dec. 18, 2021. The year of 2021 marks the 30th anniversary for the Holiday Train service by Chicago Transit Authority. (Photo by Joel Lerner/Xinhua)
The Holiday Train leaves the Addison station on the Blue Line in Chicago, the United States, Dec. 18, 2021. The year of 2021 marks the 30th anniversary for the Holiday Train service by Chicago Transit Authority. (Photo by Joel Lerner/Xinhua)
The Holiday Train pulls into Western Ave station on the Blue Line in Chicago, the United States, Dec. 18, 2021. The year of 2021 marks the 30th anniversary for the Holiday Train service by Chicago Transit Authority. (Photo by Joel Lerner/Xinhua)