One of the largest castles in the country, strategically located at the shortest crossing point to continental Europe, Dover Castle has played a prominent part in national history. Its origins lie in the Iron Age, and a Roman Lighthouse and Anglo-Saxon church can still be seen within the grounds.

Over the centuries, the defences were continually enlarged and improved, with the castle retaining a military role into the mid twentieth century. An underground hospital and the command centre used for the Dunkirk evacuation are a legacy from the Second World War.Perched high above the White Cliffs the castle is the "Key of England" and has 2,000 years of history within its walls. See the newly opened field hospital level in the secret wartime tunnels complex.