Geograph - photograph every grid square

The trig point on Crag Hill

This Ordnance Survey Trigonometrical Pillar ("trig point") is one which is still 'stone-built' without a concrete surround. This is unusual, though not exactly 'rare'.
One result is that the pillar can erode more quickly. Look at the bottom left-hand corner: this pillar will soon collapse. Unfortunately in these days of GPS systems the OS have no reason to maintain more than a handful of their 'primary' trig points - and this is clearly not one of them!
On the skyline, exactly beyond the pillar, is Skiddaw, with the Little Man to its right.