This one isn't on a walk with any of the others in the Look Sharp series, but there are a couple of other puzzle caches not too far away.
This series is based on a couple of parmstro's hobbies. You may find it easier to do Look Sharp 1, 2 and 3 before solving this one, but it's not essential.
The coordinates are somewhere in this picture
When you get there, admire the view and then look a few paces behind you.