All across the length and breadth of the British Isles, there are all manner of giant structures whose original functions are lost in time. A major class of these are the structures known as "henges". The most famous of these is, of course, Stonehenge, but this is actually not a typical henge monument. Typically, they consist of an encircling ditch and bank structure, which may enclose a central stone circle or a burial mound (whether the burial mound is there because of the henge or vice versa is still a matter for academic debate). Local examples of these are the series of interlinked henges at Thornborough near Masham, or Arbor Low in Derbyshire.
This cache brings you to a lesser known example at the intersection of three major trade routes with a smaller track leading off to a local fortified settlement.
Local tales claim that any traveller who attempts to pass widdershins around the monument are risking catastrophe.
To find the final location of the cache, you will need to do some research on the destinations (and not always the obvious ones!) of the routes from the monument. In view of the conditions on the ground close to GZ, we would recommend that you do this from the comfort of your own home, maybe with the aid of Mr.G or Mr.W, I won't tell.
The final location is at N 53o 57.ABC W2o 02.XYZ, where
A= The last digit of the current designation of the route to Huddersfield
B= The second digit of the route to Giggleswick MINUS the first digit of the route to Samlesbury
C= The third digit MINUS the second digit of the route to Kildwick
X= The first digit of the route to East and West Marton
Y= The first digit of the route to Coniston Cold PLUS the second digit of the route to Cross Roads
Z=The second digit of the route to Gisburn DIVIDED BY three