You are looking for a small well camoflaged box hidden on a public path/road in a lovely area where I like to walk. The views from this location are lovely and there are lots of great walks on public footpaths nearby.
The name of this cache comes from a track on the Pink Floyd album Atom Heart Mother and consists of music mapped onto the sound of Alan making breakfast, it's strange b ut also wonderful.
The cache is not in the wall, it's behind it and easily reachable - you do not need to remove any stones.