The entrance to the Barcelona metro at night, while people enter and exit, in the background there are illuminated businesses, lights, trees and people out of focus.
People going up and down in a subway entrance with scalators and stairs in a pedestrian zone with a lot of pleople walking by between the city buildings.
Above view of a subway train with people walking on one side, going upstairs; and on the other side, there are people waiting for another subway train.