GoPro footage shows a walker take careful steps as he makes his way along Crib Goch. The Snowdonia arête, a "knife-edge", has sheer drops either side. It has been known for walkers to suffer vertigo ...

This thrilling Grade 1 scramble in Eryri (Snowdonia) is one of the country’s most popular ridges - so what does it take to tackle Crib Goch? Ask any hill walker to name you a few classic scrambles, ...