Altitude 300m a.s.l
Steve Mclure on the Dark Half, Llanberis Slate quarries © Alex Messenger
Consists of a series of quarried levels offering pitches up to 25m. Some areas are loose - beware. Despite there being so many levels, perhaps the single best pitch is German Schoolgirl (E2 5c) up a groove.
As for Rainbow Slabs (Vivian Quarry or Bus Stop). Scramble up to reach the required one of the three levels.