Windsor Castle, the oldest and largest occupied castle in the world. Visit St George's Chapel within the grounds of Windsor Castle is one of the finest examples of Gothic architecture in England. Other highlights include, Estate apartments. Queen Mary's Dolls' House. Explore Oxford on this Walking tour. Authentic Tours By Oxford Students. Go Inside One Of The Oldest Colleges. Go Inside The Bodleian Library. This tour gives you the unique opportunity to walk inside Oxford University, with someone who has actually experienced the world famous educational institutions. Explore the world-famous architectural jewels of the Bodleian Library, Radlciffe Camera and the Bridge of Sighs to the often missed wonders hidden down small alleyways. The Cotswolds are famous for their typically English landscape of lovely green rolling hills, stone walls, woodland and charming little towns and villages. The area of the Cotswolds sits on a bedrock of Jurassic limestone. Cotswold is a self guided tour.