In reply to charliesdad:
Hi - hope you're well,
I think for bigger challenges, it would be the Alps, Dolomites and the Picos. There are some great long days out to be had in the Costa Blanca, too, e.g. Espolón Central (4c) with The Edward's Finish (5a). There are some ridges there that I've heard are fun, but probably a step down from the Cuillin.
In the UK, I think you can have a lot of fun doing big link ups, e.g. Idwal slabs into Cneifion Arete into Glyder Fach and, if you're really fit, possibly descend via Bristly Ridge for a route on the East Face of Tryfan. Or Direct Route and Slow Ledge Route into Main Wall into Gambit Climb and on to a summit.
In the Lakes, there's the "Pico Harrison Integrale" and, personally, I think there are better link ups to be had on Scafell, Gable and then either over to Pillar, Gillercombe or Birkness Combe (possibly over two days with a bivi).... I've certainly daydreamed of some long VS linkups on those crags.
Just ideas! I'm not sure why there's some snottiness from some in the thread: surely exactly the sort of topic many rock climbers (as opposed to UKC forum lurkers) would happily daydream/speculate wildly about.
All best,
Chris
Post edited at 19:06