For this achievement you'll need to gather materials in the Guiding Lands.
Specifically, you'll need to gather at one Giant Bonepile and one Giant Mining Outcrop. In order to get these giant gathering points to appear, you need to gather at the regular bonepiles and mining outcrops in a region, this will level up the gathering points in that region, the game tells you when a giant gathering point appears. You can check how close you are on the map
. Use the D-pad to switch between the region levels and the gathering point levels. If any bar has an exclamation to the right, that means there is a giant gathering point in that region.
Here's an image created by aquaCHAOS from Youtube, it shows where all bonepiles and mining outcrops can occur, though they won't always spawn.