Set with help from The National Trust along the Chilterns Cycle and Icknield Ways through the Ashridge Estate, running north/south between parking for Ivinghoe Beacon and passing Aldbury in Bucks, this series of caches, mostly along surfaced paths, are a part of the 2016 Geolympix Legacy.
Gather a letter and a number from this cache to find the Terry Bull-Punnz SERIES BONUS cache.
To find this cache: You'll need to leave the track and pass by the spooky shack featured in the 2005 horror film, The Descent. Good luck! "Once upon a time..."