Dover is most famous for Dover Castle, one of the most impressive in England built to bolster the country’s weakest point. It sprawls across the city’s hilltop and a tremendous view of the English Channel as far as the French coastline. The site has been used for over 2,000 years. There are remains of a Roman lighthouse as well as a Saxon church. The 12th century keep has walls that are 7 meters thick and is filled with scenes of Henry VIII’s visits. The secret wartime tunnels under the castle as the biggest draw, and there are tours that take you through. Dover also has some of the most extensive Roman wall paintings north of Alps, displayed at the Roman Painted House.