The Obelisk of Water (referred to as water obelisk in the standard spellbook) is used to cast the Charge Water Orb spell; the spell must be cast on the obelisk, not on an orb. It is used for enchanting an unpowered orb into a water orb, requiring level 56 Magic, granting 66 Magic experience. The obelisk is located on the island across from the shore of Catherby, reached by climbing a ladder at the end of Taverley Dungeon by the black dragons. Players may only grapple from the island to Catherby; players cannot grapple from the shore to the island.
The island on which the Obelisk of Water resides.