Tryfan

It forms part of the Glyderau group, and is one of the most recognisable peaks in Britain, having a classic pointed shape with rugged crags.

However, it was resurveyed using accurate GPS measurements and found to be 2.4 metres (eight feet) higher (which the pre-1980s surveys also recorded).

[5] There are many routes of ascent, ranging from easy ridge scrambling, to multi-pitch mountaineering rock climbs on the east face.

[8][9] However, the exposure on one side is quite great, and mountain writer Frank Showell Styles said: "In calm dry weather it is not too hard a step but the penalties of failure are unpleasant in the extreme.

"[8] Two prominent pillar-like boulders are visible on the skyline midway through the approach to the summit via the South ridge.

This route is commonly used as an alternative approach to the North Ridge, as is the nearby slabby wedge of Tryfan Bach, on the other side of the mountain.

Jumping from monoliths Siôn a Siân at the summit of Tryfan.