Ey Bob, just looking at the text on your profile. I reckon the nearest site with a bit of decent 'Wow!' factor is Duddo:
http://www.themodernantiquarian.com/site/91/duddo_five_stones.html

It's a bit of a hike up the way, but more than worth it. Also well placed for a quick side trip to the Roughting Linn carvings on the way back to the A1.
http://www.themodernantiquarian.com/site/96/roughting_linn.html

If you're not after 'Wow!' but want closest site where there's something to see (unlike Copt Hill just past Penshaw), I think it's the Hartley stone:
http://www.themodernantiquarian.com/site/1790/old_hartley.html