brown country green line nature old path rail rail-way railroad railway rural rust track train tree rails railways steel transport transportation travel way choice decision direction forward possibility iron pebbles stones trains abstract HDR instalation stripe trail city transport communication cutout electric isolated shuttle tram tram way tramway cable car electricity land porto Portugal saavem street wire dust pebble railroads stone trails traveling bush panorama pavement perspective small station voyage wires architecture coach elements embankment embankments metal metallic passenger passengers signal sleeper sleepers steam tie ties