Steve McClure and Leah Crane on Meltdown at Dinorwig, Wales

The hardest slab in the world? Impossibile to say. But Meltdown in the immense Twll Maw abyss, high up in the Welsh slate mines, is certainly a strong contender for one of the world's most difficult. This former 1980's Johnny Dawes project was freed in 2012 by James McHaffie. Now Steve McClure and Leah Crane have checked out for themselves exactly how small those tiny crimps really are...

Rock climbing in Wales - a choice selection
- Dinas Cromlech - some of the best extreme rock climbs in the entire UK.
- Cloggy - Clogwyn Du'r Arddu- the shrine of British rcok climbing.
- Vivian Quarry - the most popular slate crag in Wales
- Rainbow Slab - arguably the jewel in the crown of Llanberis slate.
- Gogarth - one of the best sea cliffs in Britain. Fullstop.
- Lower Pen Trwyn - simply the best sport crag in North Wales.
- Huntsman's Leap- one of the most popular sea cliffs in Pembroke, South Wales.