Dover Castle, Dover, Kent, England, United Kingdom, Europe

dover castle dover kent england united kingdom europe historic site medieval architecture tourist attraction entrance stone walls visitors travel sightseeing landscape cultural heritage guided tour cloudy weather castle grounds history architecture landmark fortification outdoor activity walking tour heritage site castle entrance panorama nature british history unesco military history open space exploration tranquility travel destination ancient structure scenic view tourism historical landmark family outing sightseeing adventure visitor center castle walls greenery group tour built heritage pattern tourism industry hilltop view