On the northern Channel coasts of France, just a stone's throw from Belgium, lies a breathtaking nature reserve of 70 km². I'm talking about the Bay of the Somme, a vast estuary at the mouth of the river of the same name. Idyllic coastal villages with poetically sounding names like Le Crotoy, Saint-Valéry-sur-Somme, Cayeux-sur-Mer, and Le Hourdel surround the picturesque bay and make a trip to this gem in northern France very tempting. We took the 'test on the Somme' and went there with a hefty dose of curiosity. And what could be more original than exploring the Bay of the Somme by train? By steam train, of course!