Fairfax House - As well as the Castle Museum, the city contains numerous other museums and historic buildings such as the Yorkshire Museum and its Museum Gardens, JORVIK Viking Centre, the York Art Gallery, the Richard III Museum, the Merchant Adventurers' Hall, the medieval house Barley Hall owned by the York Archaeological Trust, Fairfax House, owned by the York Civic Trust and the Treasurer's House owned by the National Trust.
York Castle, a complex of buildings ranging from the medieval Clifford's Tower to the 20th century entrance to the York Castle Museum (formerly a prison) has had a chequered history.
York's centre is enclosed by the city's medieval walls, which are a popular walk. The entire circuit is about 3 miles (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. This lake was later called the King's Fishpond, as the rights to fish belonged to the Crown.
A feature of central York is the Snickelways, narrow pedestrian routes, many of which led towards the former market-places in Pavement and St Sampson's Square. The Shambles is a narrow medieval street, lined with shops, boutiques and tea rooms. Most of these premises were once butchers' shops, and the hooks from which carcasses were hung and the shelves on which meat was laid out can still be seen outside some of them. The street also contains the Shrine of Margaret Clitherow, although it is not located in the house where she lived. Goodramgate has many medieval houses including the early 14th century Lady Row built to finance a Chantry, at the edge of the churchyard of Holy Trinity church.
Source & More Information: Wikipedia, York, http://en.wikipedia.org/wiki/York