The Lys river is the border here, and Wervicq-Sud is the French town directly across the bridge — a short walk from the centre of Wervik. The crossing is unguarded and entirely unremarkable in the post-Schengen sense, but the geography is genuinely interesting: two countries, two languages, one bridge. Walk over for a coffee in France and walk back. The French side is quieter still than the Belgian, with a handful of brasseries near the water. It is a small pleasure, but there is something satisfying about the casual ease of it — the kind of border crossing that would have been unimaginable for most of the 20th century.