In your Iran trip you can visit the unique citadel of Rayen. 100 kilometers away from south part of Kerman, there exists the second largest adobe structure of the world (after Arg-e Bam) which is the most significant historical monument remained from Sasanid dynasty. This citadel which is 22000 square meters is located on a vast hill. Like other citadels, Rayen citadel is consisted of 2 main parts, one for ordinary people and one for important positions and the governor's family. Maktab (school), barracks, quarantine, mosque, warehouse, stable are the necessary parts of the citadel for the needs of people who lived there. Rayen citadel is one of the most complete old citadels you can visit in your Iran tour!