Like many we where going from Tehran to Shiraz at quite a pace. We read in a travel guide that Fahraj is an ideal place for a rest stop.
And it is perfect to let of some steam and regroup, the historic center of fahraj can be seen in a few hours after which you can go to relax a bit in the Farvardinn and have some lunch or play some games.
Rooms are spacious with everything you need, the beds are a bit on the hard side, this was OK for us but it depends on your personal flavor.
We strongly promote taking the overnight desert tour, as it is simply breath taking, we drove by 4x4 trough the desert and you get the opportunity do drive by yourself.
In the morning you go and see some other sights in the desert.