If you need any local info for South/Mid Wales, ie Castles, Roman ruins, best beaches, nice routes, campsites, hotels, events you'd be interested in, etc give me a shout.
We have some stunning roads and scenery around here. Most parts of the UK are very picturesque if you stay off the motorways.
As has been said previously, it's not a big place in comparison to most, but has masses of historical sites and various places of interest.
For example, if your going to Stonehenge (Most people do) there are quite a few other places of interest very close like quite a few white horses (Chalk figures carved into the side of the local hills) Woodhenge which is apparently older than Stonehenge, Avebury, which is a local village set in the middle of a very large stone circle, and Glastonbury which are all close by.
Castles you will have so many to choose from you could fill your whole trip just visiting them.
If there's anything specif you need info on I'll do my best to help :-)