Children visit the "Season's Greenings: All Aboard!" exhibition at United States Botanic Garden(USBG) in Washington D.C., the United States, on Nov. 27, 2018. This year's annual USBG holiday exhibit "Season's Greenings: All Aboard!" runs from Nov. 22, 2018 to Jan. 1, 2019. Many plant-based recreations of iconic train stations from across the country like New York City's Grand Central Terminal and Detroit's Michigan Central Station are on exhibition in the train room. (Xinhua/Liu Jie)