The Cathedral in the Forest is part of the Forest of Dean Sculpture Trail which comprises 19 separate artworks around the Forest, centred around an excellent central area with various facilities including a café, toilets, childrens’ adventure playground, BBQs and a large open space for other games. Details of all of these are available at this web site, starting with a picture of the Cathedral itself here.
If you want to start at the central facility (called Beechenhurst) then park at N51°48.308', W02°33.633'. The full sculpture trail is around 4-6 miles of Forest walking depending on your route, which we can highly recommend. There is a charge for parking at Beechenhurst but the playground, toilets and BBQs are free.
Alternatively you can take a (very) short walk and visit the Cathedral and cache only, by parking at co-ordinates: N51°48.589', W02°32.796'. There are no other facilities at this car park.
The cache is an ammo box. Although it is in a Forest, we chose a location with a break in the tree canopy so a good strong signal lock is possible. However, this location has several potential hiding places, so you may like to take a copy of the spoiler picture. Please ensure that it is well covered when you leave.
During July/August/September the whole area is covered with 7 foot tree ferns and it becomes almost impossible to find (read the logs)! It's a bit easier during the Winter!