Leros and its neighbours, Kos, Samos, and Kalymnos, are popular holiday islands now, with sandy beaches and resort hotels, but in the autumn of 1943 there was fierce fighting here. In the wake of Italy’s surrender, British troops tried to seize these Italian-occupied islands. The German response was immediate and fierce. Massive air attacks forced the British and Italian troops on Leros and Kos to surrender. Soon after, Royal Navy destroyers evacuated the last British troops from Samos, in an operation that inspired the book and film The Guns of Navarone. Leros was Italy’s key naval base on the islands, and the harbour is lined with grandiose fascist art deco buildings that once housed the fleet headquarters. Artillery bunkers and tunnels are scattered around the island, but the main attraction for divers is the wreck of the Greek destroyer Vasilissa Olga.