The wreck of the SS Trifels (off Dunkirk) lies at 36 m with wheelhouse at 18 m and shallowest point at 10 m; this 137×17.22 m steamship—overgrown with thousands of anemones, carnations and bagpipes—is boat‑access only and suited to advanced wreck divers.

GPS information is approximate. For precise locations, please contact local dive operators.