Your tour will draw to a close after you take the world's oldest underground transport system, the “Tube”, or a famous English double decker bus, to the City of London. Here you will be able to see the site of the most ancient part of Greater London, the remains of a section of the old London Wall built by the Romans to defend the city from invaders. Another iconic attraction that you can admire in this part of the city is St. Paul's Cathedral, a world-famous architectural masterpiece with a huge dome which is a distinctive feature of the London skyline. We recommend you wear comfortable shoes for this three-hour walking tour, and keep your camera handy and there will be fabulous photo opportunities around every corner!