-212 81 820, far side of the hill on the NE path of Costen, or using a Ruined Mines Engraved Tablet.
The Ruined Mines are the next step for avid miners after the Far Mines. Within its depths are Cobalt and Gold Ore(add links here after cobalt/gold pages added), strong materials that when smithed properly, can make equipment powerful enough to fight the Energetic Undead lying below in the Energetic Outpost. Should you go to the lowest point of the Ruined Mines, you'll find the entrance to your next trial, the Forgotten Abyss(link here)