In pics: metro stations decorated with art works in Stockholm, Sweden

Passengers walk in the Solna Centrum metro station in Stockholm, Sweden, Oct. 8, 2019. Till now, Stockholm's subway system consists of one hundred stations, each with unique art on its platform, walls or waiting hall. Since 1957, artists have been greatly involved in the building of new stations, and they also added beautiful statues, murals, and installations to the older stations. (Xinhua/Zheng Huansong)