There is a lever in East Ardougne and Edgeville that when pulled, teleports the player to the Deserted Keep. Likewise, there is a lever in the Deserted Keep that can teleport players back to East Ardougne. If you exit the keep to the east, beware of the Chaos Elemental, and keep an eye out for Player Killers. Pulling the lever in Edgeville, then pulling the lever at the keep, will still only teleport you to Ardougne. Players who have completed the easy Wilderness Diary can right-click the lever to choose their destination.