The Dorgesh-Kaan Rich Chest is a rare chest that requires 78 Thieving and a lockpick to open. The reward for opening a rich chest is 650 experience and the chest respawns approximately every 300 seconds. The chest can be found on the first floor of the northwest corner of the city, near Oldak’s house. The location of the chest is marked by two red dots on the wiki map.
Light orbs can be used to repair magical lamps in Dorgesh-Kaan. To create a light orb, you need to have level 87 crafting. Then, you need to get some cave goblin wire and glassblowing pipe. Once you’ve completed this task, you can add the cave goblin wire to the light orb and repair it. To make more than one lamp, you’ll need to be at least level 52 in firemaking and craft glassblowing.