The Northen Wall cache is placed between the stones of the mentioned wall, part of the towns fortress system. As you reach it you will not miss the old moat - wide nerly 18 meters and deep between 5 and 6 meters. In the times when it was used, the wall in that part was not disconnected as it is now. The moat was filling with water from the Danube, because it had been connected with the river.
When you go to hunt that cache, be careful of muggles. The place is well seen by the householders in the region from both parts of the wall. Have fun with it and place it exactly where you will find it!
Jvgu gur ubyrf lbh fubhyq abg jnfgr lbhe gvzr, haqre gur ebpxf vg jvyy or sbhaq!