Where is the highest point in Panau?

I need to get the achievement 'Top of the World'. Where is the highest point in Panau?


Solution 1:

The coordinates are X: 20538 and Y: 11868. It is the top of the largest mountain.

Video walkthrough here:

Solution 2:

The highest point is the mountain top in the snowy region of the map. (Want to say it's roughly in the middle, been a few months since i last played)