Port-Launay is a commune in the Finistère department of Brittany in north-western France.
Wikipedia https://en.wikipedia.org/wiki/Port-Launay
Official Website https://structurae.info/ouvrages/viaduc-de-port-launay
Address (Unnamed Road), Port-Launay 29150, France
Coordinates 48°12'53.916" N -4°5'23.305" E