The co-ordinates will take you to a sign, firstly you need to give each letter in the sign a numeric value, for example if A=1, B=2, C=3 etc. The cache can be found at the following co-ordinates:
N53 31.EFG
W2 43.KLM
E = 4th letter, 2nd word
F = 2nd letter, 2nd word
G = 3rd letter, 6th word
K = 4th letter, 4th word
L = 2nd letter, 2nd word PLUS 2nd letter, 4th word
M = 1st letter 6th word MINUS 7th letter, 6th word
The cache site is only a 5 minute walk from the sign and you can park on the road nearby. I had walked past this site a number of times and not realised what was there until I approached it from a different angle. There are beautiful views from the cache site.