The Water Obelisk is located on an island in Catherby only accessible via the Taverley dungeon. Using the map on the right as a guide through the dungeon, the round trip to the obelisk, counting banking, takes approximately 185 seconds using the 80 agility shortcut, 205 seconds using the 70 agility shortcut, or 325 seconds without any shortcuts.

Bear in mind that running through the Taverley dungeon places you in combat range of aggressive black dragons, black demons, and poison spiders. An antidragon/dragonfire shield and strong armour is recommended.

Assuming the unpowered orbs and cosmic runes are purchased, you can make 525 water orbs an hour using the level 80 agility shortcut (&0000000000003675000000 3,675), 475 water orbs using the level 70 agility shortcut (&0000000000003325000000 3,325), and 300 water orbs using no shortcuts (&0000000000002100000000 2,100).