Applewood Mines
Applewood Mines is located near Dodge Juncture in The Frontier. It can be accessed from the entrance at the side of the highest plateau that is facing the small town.
Sandbearer Bats can be found roaming in a few rooms, possibly level 46 - 50 and if you want to retreat, make sure to run a far as you can from their territory. You may even hear them when you are close to them.
This labyrinth have rooms/areas connected by the tunnels and only certain areas is fill with 5 different mineable ores each and if by chance(a slight one), some Electrum Fragment or a broken piece(s) of a Phoenix Armor.
You might find that one big empty area where you can easily mine Marble Dusts and sandstones with a chance of getting a Electrum Hoofband, Electrum Diadem or Electrum Amulet; and a small area with 2 stalagmites and 1 stalactite 'almost' touching together, you'll find iron ores. While the rest you may find them in a room full of Sandbearer Bats.