Please note, as of 12/4/2025 puzzle solution and location has changed.
You are looking for something magnetic, BYPO.
To fill in the blanks you must work out to which seven places the seven flag clues refer. You then need to do a little bit of maths: in all cases, let a=1, b=2, …, z=26.
Cache can be found at:
N51 23. ABC W003 1D. EFG
