The town lies along the stretch of coastline designated as Gold Beach during the D-Day landings, one of the beaches used by British troops in the Allied invasion. Arromanches was selected as one of the sites for two Mulberry Harbours built on the Normandy coast, the other one built further West at Omaha Beach. Sections of the Mulberry Harbour at Arromanches still remain today with huge concrete blocks sitting on the sand, and more can be seen further out at sea.
Today Arromanches is mainly a tourist town. Situated in a good location for visiting all of the battle sites and War Cemeteries, there is also a museum at Arromanches with information about Operation Overlord and in particular, the Mulberry harbours.(source: wikipedia)