The Skeleton Coal Mining Area rivals that of the Mining guild for the amount of coal in the mining area, with 34 coal rocks. Due to its low popularity, this area is never crowded, so you will not have to fight other players to get the ore. The only downsides are that it’s in the wilderness (level 10) and level 22 skeletons roam the area and make it a challenge to mine sometimes. You should also watch out for revenants that lurk in the Wildernes. The closest bank is located in Edgeville.
It’s south of the Black Knight’s Fortress, and it’s a small walk from Edgeville.