The South Wales route above is awesome, driven those roads a lot over the years whilst getting around to RallyGB stages. The sheep on the A4059 always make it interesting, especially if the weather is poor as the visibility drops quickly as you end up in the low cloud
They're not difficult narrow twisties like some of the roads in the lake district - but faster A roads where its easy to take the sweeping corners at high speed (not that i'd do that, officer!)
The caves (i call them Danny Bogoff as i can't pronounce them) are pretty good too
