Go to co-ordinates X:2687, Y:15200 (west side Civilian district in Panau City) and 
look at the small island to the west (at X:1587, Y:15643) and the trees look exactly 
like an ant. It works best when you're sitting in a car, or boat. Co-ordinates do not 
have to be that exact though, that's just roughly where you'll need to be.

If you at it along your gun, though, the trees disappear and only the head is left.

You might want to visit because the terrain is a mixture of urban, desert and rainforest 
and there's a black box in the sea on the south side.