Berck-Plage - Paris-Plage line
The Berck-Plage - Paris-Plage line (subsequently designated Le Touquet-Paris-Plage) constituted a narrow-gauge local railway that connected two coastal resorts on the Opal Coast of the English Channel in France. This line served the administrative Pas-de-Calais department and was operational from the early 20th century.
Source: Wikipedia — Berck-Plage - Paris-Plage line (CC BY-SA 4.0)