Golubac Fortress - Wikipedia

12 Unique, Must-visit Fortresses in Georgia - Tour Guide Georgia

What are some of the best fortified historical fortresses in your opinion? - Quora

Qalat (fortress) - Wikipedia

10 fabulous castles and fortresses in Israel - ISRAEL21c

24 Jaw-Dropping Fortresses and Castles in Italy

Romania Castles and Fortresses

Khertvisi fortress on mountain. It is one of the oldest fortresses in Georgia Stock Photo - Alamy

3 Fortresses - Serbian Insiders

Fortresses - Serbia

The ancient world's largest fortresses: Persia's northern defences in late antiquity