Originally posted by Black Album:

If I continue to explore swamp tombs … will I find other bonemass locations that could be nearer to my home location?
The one listed on my map is quite a distance away and although it’s fun to explore the map for all I know there might be another bonemass very near to me in unexplored land.

And thank you for those tips, GunForBucks.

I wouldn't bet on this ... I think, the nearest one gets marked anyway ... so as long as you haven't been very far away anyway, it looks like to be the most close one to your home.