The Kale, or Skopje Fortress, a safe zone of Macedonia
Interior of the Samuel's Fortress, Ohrid, Macedonia. When the city closed itself with a quarantine zone and old walls, it restored the interior of the old fortress to avoid zombies.
Belogradchik Fortress: an ancient fortress located on the north slopes of the Balkan Mountains, close to the northwestern Bulgarian town of Belogradchik.
The fortress's walls are over 2 metres (6.6 ft) thick in the foundation and reaching up to 12 m (39 ft) in height. Three separate fortified yards exist that are connected with each other through gates. The fortress has a total area of 10,210 square metres (109,900 sq ft). Being built first when the Roman Empire, it got upgraded until 1850 by the Ottomans. During the Great Panic, the Belogradchik Fortress served for surveillance and not strictly defense, but inhabitants of the region took it, and excavated mines to reinforce the castle, adding some weapons, crops and a well, making it a safe zone against zombies. The base had a small medical post too, and military engineers created barricades to make the zombies lost if they tried to go there.