Essence mines

The Essence Mines are an enormous underground mining site where rune essence and pure essence can be mined by non-members and members alike, and are accessed through the teleportation spell of one of five NPCs in the whole world. Only two of these wizards are available for non-members. The Essence Mines are located in a huge grey cavern, where great pillars of rune and pure essence tower over all players, their ore free for the taking. The pure essence areas of the mines can only be accessed by members, and there is an alternate Essence Mine on Lunar Isle for members. The Essence Mines are not displayed anywhere on the RuneScape world map, so their exact location is unknown.