<p><span><span><span><strong><span lang="EN-US"><span><span>Dover Castle</span></span></span></strong></span></span></span></p>

<p><span><span><span><span lang="EN-US"><span><span>Dover Castle, also known as "Key to England", has been England's first line of defense for centuries. Titled as the largest castle in England by some sources, Dover castle has quite a share of history on its sleeves. While visiting, make sure you do not miss out on the secret wartime tunnels and the Great Tower. You should also book your tickets online in advance and visit The Queen's Regiment Museum.&nbsp;</span></span></span></span></span></span></p>
