colors of magic:
5 colors in the game Magic: The Gathering (green, red, blue, black, white)
3 French hens
nations playing rugby:
friends of Balthazar:
might be 2 other biblical Wise Men or Magi?
is imaginary squared:
-1 (the number i squared)
six mod three:
days of Hanukkah:
8 nights, but that might mean 9 days?
towers of Tolkien:
2 as the name of the second novel, although after a bit of googling it may be 3 White Towers
again, this probably isn't right but putting this all together, you get 53962-1082, or 52880?
total (maybe right?):
using the GPS coordinates (thanks @rhsquared for finding this idea) 53.962, -1.082 puts me (according to the thing I'm using) in "Top of York Minster", in the UK.