Please note, do not go over the walls as there are loose rocks and long drops to contend with.
The cache is in a safe place on the inside of the "area". You'll see what I mean when you get there.
Also look before you reach for the cache in case there are any nasties in there... eg spiders snakes or rats... 
I have tee'd up a local maintainer (Jowiba), and a backup maintainer (Barnzy12) in case it goes missing again.