Leaving the mosaic of Alexander behind you, you will arrive at another small gate which leads you to another ramp taking you down. When you arrive at the down floor, you’re right under the Sultan’s lodge. Walk straight ahead up to the two gates that you see at the end. Before you go out of the gates you will see a column on your right hand. This is the last column before the gates and has a hole in it. Listen to the story of the 21st point of interest.