Drone 4K view zooming in on the Ponte Ferroviario Sul Fiume Serchio, a train bridge near Garfagna, a historical region in central Italy

drone 4k ponte ferroviano sul fiume serchio train bridge garfagna historical region central italy forest woods landscape sightseeing outdoors architecture environment old alpine background valley arches stone viaduct trees mountain concrete dangerous transportation beautiful rail green nature travel railway tourism buildings tunnel roadways streets houses scenic railroad alps scenery view landmark transport