I visited in December 2017 from Shiraz, taking the local bus at 2pm and arrived around 9pm.

I stayed at a local caravanserai not far from the Jame Mosque. So the first thing to do in the morning after the warm chai was to visit the Jame Mosque. It's situated in the city center with two tall Shia minarets, the tallest in Iran at 45 meters. Other than that the mosque itself was not that impressive, probable due to the worn out pale colour of the mosaic and ceilings. My main interest in that building was to look for the Zarch Payab (The Persian Qanat WHS) that took me a while to locate it. The was a signpost next to the staircase leading all the way down to the bottom with dimming light. But I was a bit disappointed when I reached the bottom where the big well was situated, as the water was not flowing and it looked it hadn't been used for a long time. It happened the same to the other qanats I went in the city. Maybe they have a modern way to extract the water now. Luckily I saw water flowing at the Kushkno Watermill (Qanat WHS). 

Other than qanat, the city is full with tall wind towers. I was there during winter but I can imagine that it must be very hot during summer time. So the locals built tall wind towers to catch the wind, whichever direction it came from. You can see the view of the city by walking up to the upper floor of any coffee house. 

I also walked to the Amir Chakhmaq Complex and the Zoroastrian Fire Temple, where both are quite beautiful for photos at evening time. I didn't go to the Dowlat Abad Garden which is under the WHS of Persian garden, as I had been to the Ancient Garden of Pasargadee and Eram Garden of Shiraz.

My impression of Yazd is by the colour of mud, where all the buildings are same colous as the floor and desert. Historical Yazd can be done in one full day. Worth visiting.