Metro rail seen travelling accross the Dom Luis I bridge that lies over river Douro in Porto city. This is a popular tourist destination and declared a UNESCO world heritage site. The cityscape seen o
{"Image ImageDescription": "Metro rail seen travelling accross the Dom Luis I bridge that lies over river Douro in Porto city. This is a popular tourist destination and declared a UNESCO world heritage site. The cityscape seen on above and below the bridge.", "Image Copyright": "Henrique NDR Martins"}