EE York Minster, ENGLAND, the historic cathedral church stands at the city's centre. The city centre is nearly surrounded by walls, pictured. To walk the entire circuit (including parts where walls never existed) is about 3 miles. The Shambles is perhaps York's most iconic street. Formerly the lamb-butchers district, it retains most of its feel from around 4-500 years ago. It contains the shrine of Margaret Clitherow, and many gift shops. The city has many museums, including the Castle Museum, Yorkshire Museum & Gardens, Richard III Museum and the York Dungeon. The National Railway Museum is situated just behind the station, and is home to the largest static collection of railway locomotives in the world, including the world's fastest steam locomotive LNER 4468 Mallard. WIKIPEDIA SOURCE DON PUGH