Where are the best roads and streets in Iran? Specifically Mashhad and Shiraz .
Head to the Bazar-e-vakil! Great area and tons of vendors
Mentioned in this answer:
Best touristic and history area in Shiraz is Z and Complex and Downtown, You can see Bazar-e-vakil, Vakil Mosque and Arg Karimkhani. Then go to Shahcheragh and enjoy mirrors hall. Don't miss Nasir al-Mulk Mosque. Also here you can find some Things to do in Shiraz