Abyaneh, the red village (great photos in the link!): 

At the foot of the hill, the fort of Hanjan is enthroned above the here already dry wadi. A veritable Fort of the Tatar Steppe: it has awaited the enemy for two thousand years, but the enemy has not come. The invaders forgot the valley hidden among the mountains in the middle of the desert. While the seventh-century Arab conquerors forced their religion and language onto almost all Persia, the inhabitants of the valley remained Zoroastrians until the 16th century, when the central power of the Safavid dynasty was established, and they still speak the Middle Persian language of the pre-conquest Sasanian empire.