Scottish Walls

On one of my annual climbing trips to the highlands I spotted these two examples:-

 The wall above is in the forest at Aviemore.  Typically it has a slightly overhanging cope.

This one is a relatively new wall at the western end of Aviemore.  The stone is mostly Granite with copes and throughs of another blacker rock which I think is schist and is quite slabby, so it'd make better throughs than the granite.