Take a close look at this dragon. Made out of all sorts of armour, weapons and maps. Look in the belly for the hoard.
Also known as the Armoury
The line you are seeing is the line to get into the building with the Crown Jewels. The first couple of pictures in the Tower of London you saw was us headed to the Jewels. We went straight to it and had no line. Now an hour later it will take over an hour to get in.