Porth Ysgo (second best place to boulder in Wales: http://news.v12outdoor.com/2010/12/14/vg-central-v36a/) which is located near the village of Rhiw at the end of the Lleyn Peninsula.
Where on heaven or earth is Porth Ysgo second to!?!?!?!
I am of the opinion that the Llanberis Pass as a whole trumps the Porth Ysgo area (including Trwyn Talfarach, Bytylith, Mynydd y Graig and Porth Nefoedd).
Just have a good long think about Wavelength, the Barrel area, Jerry's Roof, the Cromlech plus a seemingly endless number of quality satellite problems (NASA, Jerry's Wall, Craig y Llwyfan, Pac Man, Moose's Toothpaste, Fishskin Wall, James' Wall etc). And I haven't even mentioned the atmospheric power of the 'shadow-cast hillsides' or how beautiful that evening light is...
Don't get me wrong I love Porth Ysgo dearly but the Llanberis Pass is the true heartland of Welsh bouldering.
(apologies to original poster for hijack of thread, I'd gladly take this discussion elsewhere)