Pirates have been seen digging along The Thundering Steppes' northeastern beach. Pirates digging can only mean one thing: treasure.
The instance is straightforward; make your way to the back of the tunnel at ( 836, -19, 1067 ) Copy/waypoint 836, -19, 1067, killing everything you encounter. If you're lucky, two named mobs will be up: Yukkoz (level 25, at the end of the tunnels) and/or Blark the Plank Pusher (level 25, in an alcove halfway down the tunnels at ( 914, -20, 1083 ) Copy/waypoint 914, -20, 1083).