**** THE CACHE IS NOT AT THE POSTED COORDINATES ****
The Andromeda Galaxy is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth, and the nearest major galaxy to the Milky Way.
The Andromeda Galaxy is visible to the naked eye from Earth on moonless nights, even when viewed from areas with moderate light pollution. (Wikipedia)
Another pen and paper puzzle. The 15 digits for the coordinates of GZ (plus an extra zero) are contained in this 4 × 4 grid.
9 4 0 4
2 0 0 2
5 4 3 1
3 4 0 5
Congratulations Macka4867 for FTF