Yazd

Yazd is an important city in central Iran located in the middle of a desert. So much of its development involves creative ways of making it possible to live here.
Yazd is perhaps best known for its many wind catchers shown lit up at night in the 1st picture. These are an early form of cooling for buildings, so important for a city in the middle of the desert. (See also the post of qanats for another example.)
The next 2 pictures are of Amir Chaghmagh square, the main square in Yazd. The 4th picture is of the clock tower in Markar Square, nearby Amir Chargmagh.
The next 3 pictures are at the Zoroastrian Fire Temple in Yazd. After the Muslim invasion and the effort to convert Zoroastrians to Islam, many of those who refused went to live in Yazd because it was out in the desert and somewhat protected. So this is the center of Zoroastrianism in Iran. The pictures are of the Fire Temple, a good description of the symbolism in the Fravahar, and the fire in the temple itself, known to be burning for well over 1,000 years.
The 8th picture is of the dome of Alexander's (the Great) prison. It is a madrassa today.
The next 3 pictures are examples of what the old town of Yazd is like.
And the last 3 pictures are at the Jameh Mosque here. Of note, these are the tallest minarets in Iran at 54 metersLeggi altro