This cache is not in the middle of I840!  

To solve the puzzle and find this cache, all you need to do is find out how often each digit from 0 thru 9 appears in the first one million decimal places of 𝝅.

So first, find how often each digit appears and arrange the numbers 0 thru 9 in descending order of appearance.

Then take that list you just created and number it from top to bottom with 0 thru 9.
So you should have a list with the most common number on top, which will be represented by 0.
And you'll have the least common number on the bottom of your list, which will be represented by 9.

Now using the chart you just created, decode the final coordinates of this puzzle:

N 20° 04.239 W 59° 43.395

You can validate your puzzle solution with certitude.

 

CONGRATS TO Bullfrogs56 FOR FTF!