It is the capital of Yazd Province and located 270 km southeast of Isfahan…
Because of its location surrounded by desert, it has a unique Persian architecture; this city is named the “City of Wind Towers or Shahr-e Badgirha in Persian” and recently has been considered as one of the UNESCO’s World Heritage.
It is also very well known for its Zoroastrian fire temples (Atashkadeh), Water reservoir
(Ab Anbar) and Qanat, the Persian handicrafts, hand-woven textiles, silk weaving, Persian Cotton Candy, and its time-honored confectioneries.
This city has a history of over 5,000 years, dating back to the Median Empire, when was named as Ysatis or Issatis. The present city name, however, is derived from Yazdegerd I, a Sassanian king of Persia. The city was definitely a Zoroastrian center during Sassanian times. 
Yazd has the driest climate in Iran, also is the hottest city of Iran (above 40 °C  in blazing sunshine with no humidity).

 Places to visit:

Jame Mosque
Bazaar of Yazd
Lari’s House
Tower of Silence