Babak Castle in Persian or Bəzz in Azeri), also known as the Immortal Castle or Republic Castle, is an impressive and huge building citadel on the top of a mountain, which is located 16 km southwest of Kaleibar Kaleibar City in northwestern Iran. It was the stronghold of the Iranian hero, Bābak Khorramdin who fought the Arab invaders.
Every July 10th, Iranian pilgrims attend the castle to honor and celebrate the life of their national hero, Babak, and his companions, for sacrificing their lives to defend Iran and the Iranian way of life.
Babak Castle Iran.
The castle, built on 2300-2600 meter heights, surrounded by gorges as deep as 400 to 600 meters, is believed to belong to the Parthian dynasty and was modified under the Sasanid dynasty. To reach the castle, one has to trek a tortuous and narrow passageway and then cross a corridor-shaped temple, 200 meters in length.