Will you have a car?
If so, there are some great outdoor places to visit:
Dalby Forest (1 hour drive North of York) http://www.forestry.gov.uk/forestry/infd-947fh7
Falconry Centre at Thirsk (approx 1 hour drive) http://www.falconrycentre.co.uk/visitorinfo.php
North York Moors visitor centres at Sutton Bank and Danby (approx 1 hour drive) http://www.northyorkmoors-stay.co.uk/tourist/Sutton-Bank-Visitor-Centre.html and http://www.yorkshire-east-coast-unofficial-guide.com/danby-visitors-centre.html
Too early in the year for York Maze and the various other farms.
In town, a bus tour, ghost tour, walking the walls and the York Castle museum are all great http://www.yorkcastlemuseum.org.uk/exhibition/kirkgate-the-victorian-street/
If so, there are some great outdoor places to visit:
Dalby Forest (1 hour drive North of York) http://www.forestry.gov.uk/forestry/infd-947fh7
Falconry Centre at Thirsk (approx 1 hour drive) http://www.falconrycentre.co.uk/visitorinfo.php
North York Moors visitor centres at Sutton Bank and Danby (approx 1 hour drive) http://www.northyorkmoors-stay.co.uk/tourist/Sutton-Bank-Visitor-Centre.html and http://www.yorkshire-east-coast-unofficial-guide.com/danby-visitors-centre.html
Too early in the year for York Maze and the various other farms.
In town, a bus tour, ghost tour, walking the walls and the York Castle museum are all great http://www.yorkcastlemuseum.org.uk/exhibition/kirkgate-the-victorian-street/