train lines train u-bahn in berlin transport black white color

154219949 berlin berliner black blue bridge capital city cityscape color crane dreamstimecom east electric famous fehr friedrichshain gallery german germany heavy historic kreuzberg landmark lines location means metro oberbaum oberbaumbrucke old photo place public railroad rails side sky station steel steely street subway summer thomas tourism traffic train tram trams tramtrain transit transport transportation travel tree urban vacation white yellow