The co-ordinates or locations have nothing to do with this puzzle, and the cache is not at the co-ordinates listed. To work out where the cache is, use the information provided:
N51 AB.CDE
E000 FG.HIJ
A = The seven deadly sins
B = The castle of the devil
C = Marriage of Satan
D = The Heaven
E = A temptation – A night in hell
F = The last judgement
G = The valley of lutins (hell) – An infernal banquet
H = The kitchens of Satan
I = The boiler of the devil – Resurrection
J = The purgatory