The biggest attraction in Dover is Dover Castle, with its secret wartime tunnels and The Great Tower. The Secret Wartime Tunnels were home to a command center and hospital in WWII. There were also used to evacuate soldiers from the beaches at Dunkirk. Visitors can take a guided tour that lasts about an hour to learn more about how the tunnel was used and about a famous operation, code-named Dynamo, that was organized from here.
Dover is also famous for “The White Cliffs of Dover.” The best way to really see the cliffs is to take a cruise on the channel. Unfortunately, I couldn’t get very good pictures from the ferry I was on headed to France.