This is a cache is part of a series of caches, where you have to collect partial coodinates at the following 4 cache sites...
(GC1DCKV) Cache Abduction (Alien Series #1)
(GC1DD0R) The truth is OUT There (Alien Series #2)
(GC1D4QE) Little Green Men (Alien Series #3)
(GC1DMNW) I Want To Believe (Alien Series #4)
....and put the numbers together to get the final location!
This was inspired by Harley_Sailors Playground Pick-up Series (GCVQ7X)
The cache is a small, camoed container that contains a logbook and pencil, and has some room for small traders. This spot may be busy with jogging and dog muggles, so watch your back.
A green field eh??
See some more park information here