I have been 2 times in Iran, in 2015 and 2018; I discovered an amazing country, certainly with the friendliest people of the world, an awesome history heritage like cities of Esfahan, Tabriz, or Yazd! And of course, Persepolis!
Moreover, Iran is an Amazing experience for cooking.
I traveled to Iran with a backpack, using local transport which is fast and comfortable.
So, you must see Iran!
Julien (from France)