Hadnmauer
The Hadnmauer is the protected ruin of a letzi in the Gailtal valley in Austria, dating to the Late Antiquity. It runs from Rattendorf to Jenig. Its function was probably the security of Gurina and the area to the east of it. Originally 1.6 kilometres long, only 336 metres survive. On its western side, rooms for the defending personnel are discernible.