North of the Netherlands lies the Wadden Sea, a protected natural area where low tide exposes sandbanks that connect the Dutch mainland to five islands. The smallest of these islands - Schiermonnikoog - houses but a single village with fewer than 1,000 inhabitants. But in a way, this small island has left a big mark on history: during the Second World War, it was the last place in Europe to be freed from Nazi occupation. The Nazis first arrived on Schiermonnikoog on May 15, 1940.