I
love Dorset. It is an excellent county for cycling (if you don't mind hills).
A place worth visiting is Milton Abbas. The local nob decided that he didn't want an untidy village spoiling his view, so he demolished it and re-housed the peasants in a sort of 18th century Milton Keynes, sited in a deep valley where it couldn't be seen. There is a row of identical semi-detached thatched "cottages" running down the hill which is the main street. Weird. Apparently they were far from comfortable, but of course His Nobship didn't care about that. I think there is still a tea shop in Milton Abbas; Dorset is generally well provided with tea shops. And the beer is excellent!
A visit to Lyme Regis to see the Cobb would also be on my list. Then there's Badbury Rings (very evocative - best approached by bridleway, if you're going on a mountain bike), and not far from there one of the best follies in the whole country, a huge great big triangular tower, at Horton.
If you
are going on a mountain bike, Dorset has one of the best offroad loops in the South - one way on Ox Drove, and the other on the byway a few miles north of it. If you start at Sixpenny Handley you have a fantastic on-road downhill at the end to fling all the mud off
