York is an historic walled city sited at the confluence of the rivers Ouse and Foss in North Yorkshire, England. The city is noted for its rich heritage and it has played an important role throughout much of its almost 2,000 year existence.
York Minster, the second largest Gothic cathedral in northern Europe, stands at the city's centre. York's centre is enclosed by the city's medieval walls, which are a popular walk. The entire circuit is about 5 km, including a part where walls never existed, because the Norman moat of York Castle, formed by damming the River Foss, also created a lake which acted as a city defence.